Hey guys. I have a retail version of UT3, but being the n00b I am I only just realised I could register it with steam. Now this update sounds pretty hectic good, and steam achievements are fun, so I want to register my game. Because of the free weekend, I can't register my game because it is already on the my games list. What I want to know is if I can download the 3 day free version, and then when that runs out, register my retail version without having to download it again,or can I replace the cd-key of the free trial with my retail key now, so I can play the game and not have to worry about it. Thanks guys.