I have a slightly different idea; I'm combining a set of tools into a single, bootable USB stick. I currently have Hiren's BootCD and Windows 7 32 and 64 bit installers together on one USB stick, both bootable using the Windows boot manager.
I have the Windows Boot Manager handing off to GRUB for Hiren's, but I can't seem to set up a second copy of GRUB to be able to get Ubuntu bootable off the Windows Boot Manager as well. I know I could probably swap to a single copy of GRUB that would handle all 3 choices, but I'm not very good with GRUB and can't figure out how to get the USB version of Ubuntu to boot at all.... It looks like it's using syslinux, and I'm not sure how to hand-off from GRUB/WindowsBoot to syslinux.
Anyone have any suggestions?
tl;dr: Trying to set up triple-boot USB stick, can't get 3rd part to boot, need help.