I need to change my serial # for Unreal Tournament 2K3 because when i try to play online, I recieve a message saying that someone is already using this serial #. Now how could I change the serial without uninstalling/re-installing the game?

It's probably stored in your registry. Try running regedit and doing a search.

I'd be interested in this too if anyone has a tutorial or a link too one

there is a program that will do this for you. i would try a search in google for it

Check out majorgeeks.com and then click on game tweaks on the left side for cd key changers for current games

I assume you have a backup copy, if you use GameSpy Arcade you can play without problems

Originally posted by Indiana Jones
I assume you have a backup copy, if you use GameSpy Arcade you can play without problems

Actually, since early december, I have not been able to play on the servers listed on gamespy without getting that invalid cdkey or cdkey in use message. It used to work fine but not anymore. The only way that I can play through gamespy without problems is either if I host myself or have one of my friends host and connect to him and it plays fine. Even my friends get the same message if they connect to one of the servers listed on gamespy. Any reasons as to why this might occur?

Well it was my mate who told me that it was ok through Gamespy, maybe they got wise to people using backup copies and now check for valid cd keys.