Yes but then why does it accept CD keys ??? & can i still use customs maps or mods ???...

Hi, ive got quake 3 arena on CD but my old computer scratched the disk so it won't work. Ive now got a new computer with the demo version of quake 3 arena installed, ive entered my CD key which came with my quake 3 arena disk. The problems im having are the following: * Every time i try to load the ...