Hi All, Still trying to configure a MacPro for FCP editing, and I am a little confused about adding ram. It was suggested here, not to buy ram from Apple as it is too expensive. I am looking to add 4 gigs and see that there are 2 configurations, 4x 1gig and 2x2gig modules. Considering that the MacPro comes with 1gig of ram (2x512MB), can either of these 4gig configurations be used with (in addition to) the original 1 gig, or will I have to dump the 512MBs? Also, which is the better configuration, the 4 x 1gig or the 2x2gig? Thanx Barry