[Nacho]

"There's some portable versions, floating around."

Yes but i havent seen a truly portable one yet not to mention its technically illegal to make this portable so all the big sites i know of that have portable shit dont have this...

I had a portable of cs4 for a long time in high school.

by truly portable i mean it runs as invoker and doesnt write to anywhere besides its own folder unless you save a pic somewhere or something.
if you can find me one of those i will be forever thankful.