Hey guys, I'm not trying to do anything illegal here. I purchased two copies of Macsoft Halo for MAC and I need to change CD keys from one key to another. I tried reinstalling and it just does not give me an option to change the CD key. The CD key seems to be stuck in the system somewhere and I can't find a way to modify it or delete it. Has anyone tried to do this before? Any ideas on how I can go about doing it? Thank in advance.