Booting Linux Mint Installer from USB using GRUB Legacy

[todda7]

Hello.

Don't mind the why's, but I need to boot the Linux Mint 11 x64 GNOME 'DVD' from a FAT32-partitioned USB drive using GRUB Legacy. It should _NOT_ be persistent.
I have tried
title Linux Mint Installer X64
kernel /casper2/vmlinuz file=/cdrom/preseed/mint.seed boot=casper BOOT=casper quiet splash
initrd /casper2/initrd.lz
but I get the error "Authentication Failure" (from Mint, not from GRUB).
As you can see, I also need to rename the casper folder, but that should not be a problem.

Any tips?
Thank you for your help.

[todda7]

I found the reason for my problem, though not a solution.

I copied the .iso into a folder named iso on the root of the USB-stick. Then I did:
title Linux Mint Installer X64
find --set-root --ignore-floppies /iso/linuxmint-11-gnome-dvd-64bit.iso
map --mem /iso/linuxmint-11-gnome-dvd-64bit.iso (0xff)
map --hook
chainloader (0xff)
Which produced the same error as booting it directly with GRUB Legacy (not chainloading).
Now the reason for the failure I believe is because it snatches and uses the casper-rw partition located on the USB-stick. This partition is NOT for the Linux Mint Installer, but for a Backtrack 5 persistent install I have on the same stick.

Does anybody know how to avoid this problem? The solution is to make Linux Mint not search for or utilize the casper-rw partition. I don't know how.

[todda7]

I fixed it!

title Linux Mint Installer X64
kernel /casper2/vmlinuz boot=casper BOOT=casper live-media-path=/casper2/ nopersistent
initrd /casper2/initrd.lz

The only apparent problem I have now, is that the desktop icon (in the Linux Mint Live Installer) says "Install BackTrack Live". Maybe I forgot to install some config-files or something, but ill install linux mint and see what happens. Hopefully it's just the name, not the installer which is wrong. But does anybody know why the name changed?

[todda7]

The installer is working. Linux Mint X64 Gnome was installed succesfully.

Thank you for watching.