I've installed Fedora 9 KDE live on a spare 1gb usb stick, and allocated the rest of the space to the 'persistant' file to save changes.
However KDE seems quite buggy in this initial release without updates, 3 times ive had everything just freezes except the mouse can still move, and ive hardly even started using it. Then by ctrl alt backspacing to text mode, the login doesnt work at all with root or fedora usernames.
So pretty much i want to build a new livecd iso with updates.
I found http://spins.fedoraunity.org/spins
which looks good, but i need a 700mb-ish live KDE spin.
Also i may postpone doing this to when kde 4.1 is released, but i'd still like to know is it possible, how hard and will there still be enough space on the stick? (i would think so since each program is just updated)