Here's a couple of example Grub2 entries. This produces a file named grub.iso, which then can be burned into a. Finally, make the image: $ grub-mkrescue -o grub.iso iso. If desired, make the config file grub.cfg under iso/boot/grub (see Configuration), and copy any files and directories for the disc to the directory iso/. These are (approximately) the Grub 2 commands I used. I don't know how the heck it works, but it does. Somehow, that helps it figure out that the entire boot filesystem is stuck in an ISO file. The crucial bit is mucking with the grub command that identifies the vmlinuz file, passing the iso-scan/filename argument. Edit 1: I extract the contains of iso file but still can't boot with.
My iso file store in sda10 which is a /home for the current ubuntu grub. FYI: I have multiple version of ubuntu running on my system, range from 10.04 to the latest.
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