I'm trying to create a multi boot usb flash drive that has two iso's one with a Oracle (redhat) 5 update 3 32 bit install DVD and one with the 64 bit DVD. I've been searching for awhile and it looks like pendrivelinux.com had the easiest that just throws a grub boot loader on the usb with a menu.lst. Of course like most utilities there are no examples for any redhat on there and seeing how I'm not booting to an iso of an install i'm trying to boot to the install dvd i'm not having very much luck. Any thoughts of how my menu.lst entries should look. Or if you have an easier way let me know. I'd like to stick with ISO as anytime we update to a newer version i can just swap iso's. Here's an example they have in their for ubuntu. Obviously things like the .iso and vmlinuz location i've got but all that stuff after the vmlinux i'm clueless on.

title Boot Ubuntu 9.10
find --set-root /ubuntu-9.10-desktop-i386.iso
map /ubuntu-9.10-desktop-i386.iso (0xff)
map --hook
root (0xff)
kernel /casper/vmlinuz file=/cdrom/preseed/ubuntu.seed boot=casper persistent iso-scan/filename=/ubuntu-9.10-desktop-i386.iso splash
initrd /casper/initrd.lz
boot


Thanks,
Bruce