Hmm. I'll download one of em, and fiddle with it in sony vegas. I really want to figure out a way to keep the filesize down without destroying the quality.
I got a key from EA, in 15ish minutes, and created a file in the Crysis Wars directory named "autoexec.cfg". Into that file, I placed my new key.
On the start of the game, it autoruns, replaces my steam key with the new one, and tada. It works.