Create a new version of paste:

menuentry "clonezilla-live-2.7.0-10-amd64.iso" {
  loopback loop /boot/iso/clonezilla-live-2.7.0-10-amd64.iso
  linux (loop)/live/vmlinuz findiso=/boot/iso/clonezilla-live-2.7.0-10-amd64.iso toram=filesystem.squashfs boot=live union=overlay username=user config components noswap edd=on nomodeset noprompt nosplash locales= keyboard-layouts= ocs_live_run="ocs-live-general" ocs_live_extra_param="" ocs_live_batch=no gfxpayload=1024x768x16,1024x768 ip=frommedia i915.blacklist=yes radeonhd.blacklist=yes nouveau.blacklist=yes vmwgfx.blacklist=yes
  initrd (loop)/live/initrd.img
}
menuentry "clonezilla-live-2.7.0-10-i686-pae.iso" {
  loopback loop /boot/iso/clonezilla-live-2.7.0-10-i686-pae.iso
  linux (loop)/live/vmlinuz findiso=/boot/iso/clonezilla-live-2.7.0-10-i686-pae.iso toram=filesystem.squashfs boot=live union=overlay username=user config components noswap edd=on nomodeset noprompt nosplash locales= keyboard-layouts= ocs_live_run="ocs-live-general" ocs_live_extra_param="" ocs_live_batch=no gfxpayload=1024x768x16,1024x768 ip=frommedia i915.blacklist=yes radeonhd.blacklist=yes nouveau.blacklist=yes vmwgfx.blacklist=yes
  initrd (loop)/live/initrd.img
}
menuentry "clonezilla-live-2.6.6-15-amd64.iso" {
  loopback loop /boot/iso/clonezilla-live-2.6.6-15-amd64.iso
  linux (loop)/live/vmlinuz findiso=/boot/iso/clonezilla-live-2.6.6-15-amd64.iso toram=filesystem.squashfs boot=live union=overlay username=user config components noswap edd=on nomodeset noprompt nosplash locales= keyboard-layouts= ocs_live_run="ocs-live-general" ocs_live_extra_param="" ocs_live_batch=no gfxpayload=1024x768x16,1024x768 ip=frommedia i915.blacklist=yes radeonhd.blacklist=yes nouveau.blacklist=yes vmwgfx.blacklist=yes
  initrd (loop)/live/initrd.img
}
menuentry "clonezilla-live-2.6.6-15-i686-pae.iso" {
  loopback loop /boot/iso/clonezilla-live-2.6.6-15-i686-pae.iso
  linux (loop)/live/vmlinuz findiso=/boot/iso/clonezilla-live-2.6.6-15-i686-pae.iso toram=filesystem.squashfs boot=live union=overlay username=user config components noswap edd=on nomodeset noprompt nosplash locales= keyboard-layouts= ocs_live_run="ocs-live-general" ocs_live_extra_param="" ocs_live_batch=no gfxpayload=1024x768x16,1024x768 ip=frommedia i915.blacklist=yes radeonhd.blacklist=yes nouveau.blacklist=yes vmwgfx.blacklist=yes
  initrd (loop)/live/initrd.img
}
menuentry "clonezilla-live-2.6.5-21-amd64.iso" {
  loopback loop /boot/iso/clonezilla-live-2.6.5-21-amd64.iso
  linux (loop)/live/vmlinuz findiso=/boot/iso/clonezilla-live-2.6.5-21-amd64.iso toram=filesystem.squashfs boot=live union=overlay username=user config components noswap edd=on nomodeset noprompt nosplash locales= keyboard-layouts= ocs_live_run="ocs-live-general" ocs_live_extra_param="" ocs_live_batch=no gfxpayload=1024x768x16,1024x768 ip=frommedia i915.blacklist=yes radeonhd.blacklist=yes nouveau.blacklist=yes vmwgfx.blacklist=yes
  initrd (loop)/live/initrd.img
}
menuentry "clonezilla-live-2.6.5-21-i686-pae.iso" {
  loopback loop /boot/iso/clonezilla-live-2.6.5-21-i686-pae.iso
  linux (loop)/live/vmlinuz findiso=/boot/iso/clonezilla-live-2.6.5-21-i686-pae.iso toram=filesystem.squashfs boot=live union=overlay username=user config components noswap edd=on nomodeset noprompt nosplash locales= keyboard-layouts= ocs_live_run="ocs-live-general" ocs_live_extra_param="" ocs_live_batch=no gfxpayload=1024x768x16,1024x768 ip=frommedia i915.blacklist=yes radeonhd.blacklist=yes nouveau.blacklist=yes vmwgfx.blacklist=yes
  initrd (loop)/live/initrd.img
}
menuentry "clonezilla-live-2.6.4-10-amd64.iso" {
  loopback loop /boot/iso/clonezilla-live-2.6.4-10-amd64.iso
  linux (loop)/live/vmlinuz findiso=/boot/iso/clonezilla-live-2.6.4-10-amd64.iso toram=filesystem.squashfs boot=live union=overlay username=user config components noswap edd=on nomodeset noprompt nosplash locales= keyboard-layouts= ocs_live_run="ocs-live-general" ocs_live_extra_param="" ocs_live_batch=no gfxpayload=1024x768x16,1024x768 ip=frommedia i915.blacklist=yes radeonhd.blacklist=yes nouveau.blacklist=yes vmwgfx.blacklist=yes
  initrd (loop)/live/initrd.img
}
menuentry "clonezilla-live-2.6.4-10-i686-pae.iso" {
  loopback loop /boot/iso/clonezilla-live-2.6.4-10-i686-pae.iso
  linux (loop)/live/vmlinuz findiso=/boot/iso/clonezilla-live-2.6.4-10-i686-pae.iso toram=filesystem.squashfs boot=live union=overlay username=user config components noswap edd=on nomodeset noprompt nosplash locales= keyboard-layouts= ocs_live_run="ocs-live-general" ocs_live_extra_param="" ocs_live_batch=no gfxpayload=1024x768x16,1024x768 ip=frommedia i915.blacklist=yes radeonhd.blacklist=yes nouveau.blacklist=yes vmwgfx.blacklist=yes
  initrd (loop)/live/initrd.img
}
menuentry "gparted-live-1.1.0-8-amd64.iso" {
  loopback loop /boot/iso/gparted-live-1.1.0-8-amd64.iso
  linux (loop)/live/vmlinuz boot=live union=overlay username=user config components noswap nosplash noprompt ip=frommedia gfxpayload=1024x768x16,1024x768,1024x600 i915.blacklist=yes radeonhd.blacklist=yes nouveau.blacklist=yes vmwgfx.blacklist=yes toram=filesystem.squashfs findiso=/boot/iso/gparted-live-1.1.0-8-amd64.iso
  initrd (loop)/live/initrd.img
}
menuentry "gparted-live-1.1.0-8-i686-pae.iso" {
  loopback loop /boot/iso/gparted-live-1.1.0-8-i686-pae.iso
  linux (loop)/live/vmlinuz boot=live  union=overlay username=user config components quiet noswap acpi=off irqpoll noapic noapm nodma nomce nolapic nosmp ip= net.ifnames=0 nomodeset vga=normal nosplash findiso=/boot/iso/gparted-live-1.1.0-8-i686-pae.iso
  initrd (loop)/live/initrd.img
}
menuentry "gparted-live-1.0.0-5-i686.iso" {
  loopback loop /boot/iso/gparted-live-1.0.0-5-i686.iso
  linux (loop)/live/vmlinuz boot=live union=overlay username=user config components noswap nosplash noprompt ip=frommedia gfxpayload=1024x768x16,1024x768,1024x600 i915.blacklist=yes radeonhd.blacklist=yes nouveau.blacklist=yes vmwgfx.blacklist=yes toram=filesystem.squashfs findiso=/boot/iso/gparted-live-1.0.0-5-i686.iso
  initrd (loop)/live/initrd.img
}
menuentry "gparted-live-1.0.0-5-i686.iso (Failsafe mode) for netbook" {
  loopback loop /boot/iso/gparted-live-1.0.0-5-i686.iso
  linux (loop)/live/vmlinuz boot=live  union=overlay username=user config components quiet noswap acpi=off irqpoll noapic noapm nodma nomce nolapic nosmp ip= net.ifnames=0 nomodeset vga=normal nosplash findiso=/boot/iso/gparted-live-1.0.0-5-i686.iso
  initrd (loop)/live/initrd.img
}
menuentry "gparted-live-0.25.0-3-i686-pae.iso - for dd iso" {
  loopback loop /boot/iso/gparted-live-0.25.0-3-i686-pae.iso
  linux (loop)/live/vmlinuz boot=live union=overlay username=user config components noswap nosplash noprompt ip=frommedia gfxpayload=1024x768x16,1024x768 i915.blacklist=yes radeonhd.blacklist=yes nouveau.blacklist=yes vmwgfx.blacklist=yes toram=filesystem.squashfs findiso=/boot/iso/gparted-live-0.25.0-3-i686-pae.iso
  initrd (loop)/live/initrd.img
}
menuentry "grml64-full_2020.06.iso" {
  loopback loop /boot/iso/grml64-full_2020.06.iso
  linux (loop)/boot/grml64full/vmlinuz findiso=/boot/iso/grml64-full_2020.06.iso apm=power-off gfxpayload=1024x768x16,1024x768 boot=live live-media-path=/live/grml64-full/ bootid=grml64full202006 nomce noeject noprompt lang=de --
  initrd (loop)/boot/grml64full/initrd.img
}
menuentry "Kubuntu-18.04.1-desktop-amd64.iso" {
  loopback loop /boot/iso/Kubuntu-18.04.1-desktop-amd64.iso
  linux (loop)/casper/vmlinuz boot=casper iso-scan/filename=/boot/iso/Kubuntu-18.04.1-desktop-amd64.iso locale=de_DE console-setup/layoutcode=de noeject noprompt nopersistent --
  initrd (loop)/casper/initrd
}
menuentry "kubuntu-20.04-desktop-amd64.iso" {
  loopback loop /boot/iso/kubuntu-20.04-desktop-amd64.iso
  linux (loop)/casper/vmlinuz boot=casper iso-scan/filename=/boot/iso/kubuntu-20.04-desktop-amd64.iso locale=de_DE console-setup/layoutcode=de noeject noprompt nopersistent --
  initrd (loop)/casper/initrd
}
menuentry "lubuntu-18.04.1-desktop-i386.iso" {
  loopback loop /boot/iso/lubuntu-18.04.1-desktop-i386.iso
  linux (loop)/casper/vmlinuz boot=casper iso-scan/filename=/boot/iso/lubuntu-18.04.1-desktop-i386.iso locale=de_DE console-setup/layoutcode=de noeject noprompt nopersistent --
  initrd (loop)/casper/initrd
}
menuentry "lubuntu-18.04.1-desktop-amd64.iso" {
  loopback loop /boot/iso/lubuntu-18.04.1-desktop-amd64.iso
  linux (loop)/casper/vmlinuz boot=casper iso-scan/filename=/boot/iso/lubuntu-18.04.1-desktop-amd64.iso locale=de_DE console-setup/layoutcode=de noeject noprompt nopersistent --
  initrd (loop)/casper/initrd.lz
}
menuentry "lubuntu-20.04.1-desktop-amd64.iso" {
  loopback loop /boot/iso/lubuntu-20.04.1-desktop-amd64.iso
  linux (loop)/casper/vmlinuz boot=casper iso-scan/filename=/boot/iso/lubuntu-20.04.1-desktop-amd64.iso locale=de_DE console-setup/layoutcode=de noeject noprompt nopersistent --
  initrd (loop)/casper/initrd
}
menuentry "pmagic_2020_02_23.iso i686" {
  loopback loop /boot/iso/pmagic_2020_02_23.iso
  linux (loop)/pmagic/bzImage iso_filename=/boot/iso/pmagic_2020_02_23.iso edd=on load_ramdisk=1 prompt_ramdisk=0 rw gfxpayload=text loglevel=9 max_loop=256 vmalloc=512MiB keymap=de-latin1 de_DE
  initrd (loop)/pmagic/initrd.img (loop)/pmagic/fu.img (loop)/pmagic/m32.img
}
menuentry "pmagic_2020_02_23.iso x86_64" {
  loopback loop /boot/iso/pmagic_2020_02_23.iso
  linux (loop)/pmagic/bzImage64 iso_filename=/boot/iso/pmagic_2020_02_23.iso edd=on load_ramdisk=1 prompt_ramdisk=0 rw gfxpayload=text loglevel=9 max_loop=256 vmalloc=512MiB keymap=de-latin1 de_DE
  initrd (loop)/pmagic/initrd.img (loop)/pmagic/fu.img (loop)/pmagic/m64.img
}
menuentry "pmagic_2020_05_20.iso i686" {
  loopback loop /boot/iso/pmagic_2020_05_20.iso
  linux (loop)/pmagic/bzImage iso_filename=/boot/iso/pmagic_2020_05_20.iso edd=on load_ramdisk=1 prompt_ramdisk=0 rw gfxpayload=text loglevel=9 max_loop=256 vmalloc=512MiB keymap=de-latin1 de_DE
  initrd (loop)/pmagic/initrd.img (loop)/pmagic/fu.img (loop)/pmagic/m32.img
}
menuentry "pmagic_2020_05_20.iso x86_64" {
  loopback loop /boot/iso/pmagic_2020_05_20.iso
  linux (loop)/pmagic/bzImage64 iso_filename=/boot/iso/pmagic_2020_05_20.iso edd=on load_ramdisk=1 prompt_ramdisk=0 rw gfxpayload=text loglevel=9 max_loop=256 vmalloc=512MiB keymap=de-latin1 de_DE
  initrd (loop)/pmagic/initrd.img (loop)/pmagic/fu.img (loop)/pmagic/m64.img
}
menuentry "pmagic_2020_10_12.iso now only x86_64" {
  loopback loop /boot/iso/pmagic_2020_10_12.iso
  linux (loop)/pmagic/bzImage iso_filename=/boot/iso/pmagic_2020_10_12.iso edd=on load_ramdisk=1 prompt_ramdisk=0 rw gfxpayload=text loglevel=9 max_loop=256 vmalloc=512MiB keymap=de-latin1 de_DE
  initrd (loop)/pmagic/initrd.img (loop)/pmagic/fu.img (loop)/pmagic/m.img
}
menuentry "pmagic_2020_12_25.iso now only x86_64 very long boot" {
  loopback loop /boot/iso/pmagic_2020_12_25.iso
  linux (loop)/pmagic/bzImage iso_filename=/boot/iso/pmagic_2020_12_25.iso edd=on load_ramdisk=1 prompt_ramdisk=0 rw gfxpayload=text loglevel=9 max_loop=256 vmalloc=512MiB keymap=de-latin1 de_DE
  initrd (loop)/pmagic/initrd.img (loop)/pmagic/fu.img (loop)/pmagic/m.img
}
menuentry "System Rescue CD 6.0.2 x64" {
  set gfxpayload=keep
  set isofile="/boot/iso/systemrescuecd-6.0.2.iso"
  echo "loading $isofile"
  loopback loop $isofile
  linux (loop)/sysresccd/boot/x86_64/vmlinuz img_label=MULTIBOOT img_loop=boot/iso/systemrescuecd-6.0.2.iso archisobasedir=sysresccd vga=791 setkmap=de 
  initrd (loop)/sysresccd/boot/x86_64/sysresccd.img
}
menuentry "Acronis True Image 2014" {
  linux /boot/acronistrueimage2014/kernel.dat vga=791 root=/dev/ram0 quiet
  initrd /boot/acronistrueimage2014/ramdisk.dat
}
menuentry "Acronis True Image 2018 ISO" {
  set quiet=1
  set gfxpayload=1024x768x32,1024x768
  set mbrcrcs=on
  set isofile="/boot/iso/AcronisTrueImage2018.iso"
  search --set -f $isofile
  loopback loop $isofile
  linux (loop,msdos1)/dat10.dat lang=de_de quiet force_modules=usbhid
  initrd (loop,msdos1)/dat11.dat (loop,msdos1)/dat12.dat
  boot
}
menuentry "super_grub2_disk_hybrid_2.04s1-1.iso" {
search --no-floppy --label MULTIBOOT --fs-uuid --set=root 23B2-C998
set isofile=/boot/iso/super_grub2_disk_hybrid_2.04s1-1.iso
loopback loop $isofile
configfile (loop)/boot/grub/loopback.cfg
}