Let the dust settle for now. But here's what you can do with what you have now. Use the /3GB switch in your boot.ini and that helps a little to relieve some crunch. Look at exactly 3GB for your nice priced C2D and wait for the bugs to work out in 64-bit land.
Ok Bob hope your still here. Did a little research. Your right. cs2 only can use part of the first 2 gigs. Is it possible to do what i want to do? photoshop cs3 upgrade is only $199 at newegg. So switching is not a big deal. Basically i want to run as many memory intensive 32 bit apps as possible at the same time. What do you think is the best way to do this?