Hello everyone :-) Mats, what do You mean by that? Does this "trick" decrease the overall performance of the system and applications? I'd like to know how to enable this in Windows 7 beta. I'm just curious - as BoardBabe said earlier - just "for educational use ONLY". Recently, when I was testing many Windows "tweaking" programs, I found one (which name I can't remember right now...) that had an option to "force" 32-bit Vista to see the memory above 4 GB. So maybe there is any registry hack, that would make it happen. Now I'm using 64-bit version of Win 7 beta (build 7000), but I'd like to install 32-bit version of the build 7022 and enable the option, which would allow the system to take advantage of all my memory. Just for my curiosity. Any help on how to do that (step by step) would be appreciated. Greetings.