Multiple Persistant linux install

[Durnt]

Is there any way to load up multiple linux flavors (such as ubuntu and its variations, backtrack, dsl, desbian,ect..) on to a USB drive with persistance?

[C.S.Cameron]

Some persistence methods are not compatible with others.
Using the grub2 MultiBootUSB method you can have Puppy and Ubuntu persistent.

http://ubuntuforums.org/showthread.php?t=1518273

[Durnt]

well....is there some way to perhaps boot off a non-persistant usb OS then make some changes, then some how repackage the OS to a seperate usb or iso to reinstall it on the drive with modifications?

essentially i was hoping to have maybe 6-8 OS's on a usb and and while i don't need to constantly change the files, i wanted to make certain adjustments such as extentions, networking, programs, and audio settings(don't need blaring audio on bootup in class >.<).

Not sure if that url is helpful but ill try it out when i get home