Hello, I need some help from someone who is familiar with installing XP PRO X64 Operating System. I like to upgrade and troubleshoot PC's and a friend of mine is getting out of the business of PC building at a corporate level. He gave me some leftover microsoft programs that he has. I now have a few XP Pro x64 operating systems and other software and I wanted to know if I use the x64 Xp on a 32 bit pc, will it default to regular XP PRO installation? If anyone knows for sure I would be forever grateful for the info. Thanks P.S. This is my first post, so forgive me if I'm now doing this right.