Presently I have two operating systems. I would like to do away with one (2000Pro "D") and keep the other (XP Pro "R"). Presently I use "Acronis Disk Director Suit 10" and use the OS selector at start-up to choose the operating system. I installed the suite in a folder on drive "F". Does this matter? The boot wiz program resides on "D". This is where 2000 Pro is installed as well. (how would I format and install to "D" without problems?) Is it as simple as reformatting and then installing the NEW XP Pro in the “D” Partition and then reinstalling Acronis? What I would like to do is go back to one OS for now but I would like to keep the old XP install until I make sure that I have all my settings and configurations that I like in the NEW XP install. Then delete the old install (or reformat the partition and do some consolidating). At some point in the future I would like to give Vista a try but that is not necessary at the moment. (just in case there is something that I could do now that would make this Vista install easier in the future) I would like to do a clean install of Xp Pro in the "D" Partition where 2000 Pro currently resides. Or even better yet where "C" is...as long as this location does not cause a problem. (different hard drive) How can I do an install on this partition without screwing up the boot file and/or startup? Any Help? PS...I haven't read everything on the forum yet. But i'm working on it. I know that there are allot of questions in this post. Hopefully they will help someone in the future.