which one is better? Windows XP Professional x64 Edition or Windows XP Professional 32bit . can anyone tell me the MAJOR differences in both. . history: i am using Windows XP Pro SP2 32bit and recently got the "Windows XP Professional x64 Edition", which supports 64bit processors and mine is a Intel Pentium D [i.e Dual-Core and m/b is D102GGC2], so it should get installed on my PC. but should i install the 64bit edition? wat will be the pros & cons of doing this? . another question pertaining to WIN XP PRO 64x is that it contains "Windows Server 2003". do i need it? even if i dont need it and still install 64x, will my computer work better?