Ok, so i have Windows XP Pro installed, on my computer. I upgraded from ME, but it's causing a ton of problems. I have the XP Pro Full Install CD as well, so i want to format my C drive, and install a fresh copy of XP Pro. How do i do this? Basically i want to reformat my hardrive, but i heard something about having to worry about "FAT" once you reformat. What is this, and how do i format? Thanks in advance.