Grub2 Syntax for Chainloading

To chainload a Windows OS: (on partition 2 of drive 0)

# Entry (5) WinOS
menuentry "WinOS" {
insmod chain
insmod ntfs
set root=(hd0,2)
chainloader +1
}

To chainload grub on a different partition:

# Entry (3) TinyCore - Test
menuentry "TC-Test" {
insmod chain
set root=(hd0,7)
chainloader +1
}

You should not have do an insmod 'filesystem' if it is any ext2,ext3,ext4

Otherise include insmod filesystem.mod after insmod chain, where 'filesystem' is one of the following:

affs,afs,afs_be,befs,befs_be,btrfs,cpio,ext2,fat,hfs,hfsplus,iso9660,
jfs,minix,minix2,nilfs2,ntfs,pxe,reiserfs,sfs,tar,udf,ufs1,ufs2,xfs,zfs