If you hate swapping discs, like I do, check this out:
http://www.daemon-tools.com/It, along with something like CloneCD, allows you to copy your CDs to your harddrive, then mount them in a virtual CD drive. Thus the game thinks you have the CD in, and you don't have to wait for gamecopyworld or whatever to catch up with patches.
And, assuming you buy the game and burn your own image, it's 100% legit.
--Joe