yes ... took me ages to find out how this should work! ...
But i need a page for that, i cant create new pages in the wiki :-(
I tried it on 2 USB Stick + a MacMini 2006 and a MacBook Pro 5,2. It worked without any problems.
The only annoying is, iu could not find a way to make it default boot volume. So you have to hold down alt/option and select refit all the time...
ochorocho