Hello everybody! I've been anxiously awaiting a decent Mac Pro update for the past year, and now that the time has finally arrived, I am more than ready to take the plunge. I have been reading this forum extensively over the past month (which has answered PLENTY of questions for me, thanks!), but I just have one really silly question... I've been using my Powerbook G4 for the past 5 years, so this will be my first desktop computer since then, and obviously, my first Mac Pro. Because of this, I have become somewhat clueless about certain aspects of desktop computers. I'm going to order the base configuration from Apple, and because of the suggestions I have read in this forum, I am going to buy all my additional RAM and HDs from OWC and other 3rd party vendors. I want to upgrade to the 8800GT, but since I need the Mac Pro ASAP for some projects, I don't want to wait the 2-3+ weeks for the entire system. So, I am willing to order 8800GT for installation at a later time, but I am wondering how easy it is to install a graphics card in the Mac Pro. I know I can install RAM and most likely the HDs, but I am unsure if I need to do anything special to install a graphics card. Sorry if this is a silly question, I've just been used to my Powerbook for the last 5 years of my life!