Unable to boot to Live USB linux

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http://askubuntu.com – I am trying to test different distros from a specific usb thumb drive that I have. I am installing them using UNetBootIn. The installation goes fine. I am doing this process from Xubuntu 12.10 live usb (and sometimes Linux mint 13 Mate). However when I try to boot from it, I get to the UNetBootIn bootloader and after I choose an option, most of them seem to just hang there. Farthest I got was with Mageia which Kernel paniced about 2 seconds into the boot sequence. The Distros I used were Ubuntu 12.10 Mageia Dual Arch cd, latest release Linux Mint 14 Mate Linux Mint 14 Cinnamon Linux Mint (HowTos)