Does anyone have any experience of windows 64 bit edition? I have scoured the web and not been able to find the answer to this question. Is it possible to install 64 bit onto XP Home edition, or does it have to be XP Pro?
Win XP 64-bit is a new operating system. It doesn't matter what you are running now - it will overwrite it, or you can dual-boot with it.
It will only run on 64-bit processors, either Athlon-64 or the latest 64-bit capable Pentiums.
At the moment it is in the beta testing phase, reputedly at Release Candidate 2, i.e. pretty near release. If you can get on to the testing program (not difficult) Microsoft will give you the download link to the latest version.