This entire text comes from PenDriveLinux.com
MultiBoot USB Menu (You simply select an ISO to boot from USB)
Syslinux loads GRUB4DOS and the following Boot menu is presented.
Basic Essentials to create a Multi ISO Boot USB Flash Drive
â€¢1GB-16GB USB Flash Drive (depending on how many ISO's you use)
â€¢PC that can boot from USB
â€¢Windows host to create the Bootable USB
â€¢Your select ISO Files
This process will currently enable you to do the following:
Boot Linux Mint 8 ISO from USB
Boot Ubuntu 9.10 ISO from USB
Boot Xubuntu 9.10 ISO from USB
Boot Kubuntu 9.10 ISO from USB
Boot Ubuntu 9.10 Netbook Remix from USB
Boot Ubuntu 9.10 Rescue Remix from USB
Boot Ubuntu 9.10 Server Install ISO from USB
Boot Parted Magic 4.5 ISO from USB
Boot DSL 4.4.10 initrd ISO from USB
Boot Ultimate Boot 4.11 CD (UBCD) ISO from USB
Boot SliTaz Linux 2.0 ISO from USB
Boot OphCrack XP ISO from USB
Boot OphCrack Vista ISO from USB
Boot RIPLinux 9.3 ISO from USB
Boot boot.kernel.org (BKO) gpxe.lkrn from USB
How to Boot Multiple ISO Files from USB
1.Download and run MultiBootISOs.exe and follow the onscreen instructions. You can download it here.
2.Grab the ISO files you want to boot (links provided below) and copy the ISO files to the root of your USB Flash Drive
3.Restart your PC booting from the USB device
4.Select the ISO you want to Boot from the Menu and enjoy!
That's all there is to it. You should now be booting your favorite ISO files from your Multi-Boot USB device!