Hey guys, I've searched this all over the web and on apple forums and I still have not gotten a clear answer. After I did a full install of Leopard and boot camp on my mac pro that has 4 gigs of ram (2x512 + 2x1gig on top riser and 2x512 on bottom riser) it only shows 2 gigs of ram (1.98 gig ) in winXP. I added the additional 2 - 1 gig modules the first week I had my mac pro and they work great in mac os. Always have worked great and Mac OS shows 4 gig. People in other forums have different opinions, saying that it is a win xp issue, a 32 bit OS issue, and various other things, but it doesn't make any sense. There are 3 guys I work with that have macs. 2 have mac pros and 1 a macbook pro. The macbook pro guy has gotten 4 gigs to register in XP. One of the mac pro guys has a similar problem to me. He has 6 gigs of RAM and only sees 2. The other mac pro guy has 3 gigs and sees all 3 gigs in windows. So I am thoroughly confused. Moreover, all the forums and people's posts I have seen pretty much focus on boot camp beta and not the full version in Leopard. Can someone please help me get WinXP see all 4 gig? I know it has to be possible. Do I just need Vista 32 bit ?