Hey guys so I'm trying to put several versions of Linux on my usb thumb stick. I'd like to have a persistent version like Stax, that will save changes to the stick but also have the ability to start up other versions like parted magic. So far I've found out how to do a multiple boot usb drives but I'm having a hard time finding the info on doing it with a single persistent that have other versions bootable from start up.

Anyone know if this is possible? Or am I stuck with only versions that will not save?