main steps xen 4.1.1 - update grub2

edward@pituba:~$ cat /etc/grub.d/40_custom
#!/bin/sh
exec tail -n +3 $0
# This file provides an easy way to add custom menu entries.  Simply type the
# menu entries you want to add after this comment.  Be careful not to change
# the 'exec tail' line above.

menuentry "Ubuntu, Xen 4.1.2 RC1 dom0 2.6.32.43-xen-pv-02" {
   recordfail
   insmod part_msdos
   insmod ext2
   set root=('/dev/sda,msdos1)'
   search --no-floppy --fs-uuid --set=root ff98608f-c5c8-46fc-a81e-5d77743e9231
   multiboot /xen-4.1.2-rc1-pre.gz dummy=dummy ro noreboot dom0_mem=1024000 com1=115200 console=com1,vga
   module /vmlinuz-2.6.32.43-xen-pv-02 dummy=dummy root=/dev/sda2 ro console=hvc0 console=tty0 xencons=hvc i915.modeset=1
   module /initrd.img-2.6.32.43-xen-pv-02
}
edward@pituba:~$