I've been frustrated with this several times before too... I used to play a lot of games and just got tired of having to track down my discs when all of the information was already on the hard drive anyways...
Those guys are right; If you're looking for a no-disc crack, this is certainly not the place to ask. I'm pretty sure I can get deleted just for thinking about giving you the answer to your question.
You should probably just google and see what you can find on less-strict forums, because the info's definitely out there.