I've been banging my head against a wall for three solid days now on this issue, and I'm just not getting anywhere. So, I figured I'd finally stop being stubborn and ask someone else...
What I'm trying to do seems - I think - to be fairly simple. I've got 15 different "Live CD" ISO's that I'd like to place on a USB drive so that I can boot from it and try each one out to figure out which one I want to go with. It'd be nice if I could just install from the USB once I've figured that out, but it's not necessary.
I've tried so many things that I've lost track, but the two most recent are:
This looks like it should do exactly what I want, but even after chosing "Install syslinux and copy all required files" it does not seem to actually install the bootloader correctly.
This does extract and install the bootloader correctly, but it only supports one distro at a time.
I know there can be some issues with the different "Live CDs" and how they handle the boot procedure, however, other than Arch, CrunchBang, Peppermint and Mint, all the desired ISO's are Ubuntu or derivatives, and all recent (13.04 & 12.04).