Cds Cds I originally bought The sims 2 for myself, but my sister being the greedy hog she is installed it on her comp.... So to get my cd back i bought her Nightlife for her Bday and when she installed it, it crashed so while i was busy she put it on my computer and played it there ( Talk about invasion of space) So i was wondering can i put in the Sims 2 disc and still play nightlife? Or should i buy my own nightlife... or Get Univercity and have all the EPs BWAHAHA! but i dont want to spend my 30 bucks on a game we already own....