I have a HP 8510 laptop running Win 7 but I needed to run XP for legacy programs that don't run under Win 7. I ordered a SATA replacement HD (500GB @ 7200 rpm) but I need to format it (I think) since it was shipped from a supplier but did not include any formating disks. I tried using the Windows XP CD (for Dell) I had from my Dell Laptop but after booting the laptop from the CD and watching the Windows XP Setup program run, the screen displays a message saying " Setup did not find any hard drives installed on your computer. Setup cannot continue. To quit Setup, press F3". How can you format / partition the hard drive?