Help With Windows Vista Installation

Hello. Well i upgraded my PC to a newer one (had AGP until now) except for my hard drive, in which i decided to keep.. and I've been having some issues with Windows Vista Installation. I bought an OEM Version of Windows Vista Ultimate 64 bit. The hard drive had an installation of Windows XP PRO in it, and i never deleted it. I installed all the new hardware i bought without reformatting anything or cleaning out my hard drive. I put in a Windows XP PRO CD, and tried to reformat through there. After installation, my computer reboots, and I'm thinking it was gonna take me to the Windows XP installation, but it didn't, it took me to the reformatting screen again, where you choose the partitions you wanted to make. After that, i put in the Windows Vista Ultimate CD in to see if it would install, but it didn't. It gave me an error saying: ''This computer's hardware may not support booting to this disk. Ensure that the disk's controler is enabled in the computer's BIOS menu'' (It is). After that, it says: ''Windows is unable to find a system volume that meets its criteria for installation''. I tried using KillDrive (deleted everything in your hard drive), after cleaning everything out, it worked for the first stage of the VISTA installation, after the first restart that the installation makes you do, it just stopped installing and i had to re-enter my CD key again, and the same error came up. Not sure what it is, but it's bothering the hell out of me, Some one please help!!


PC Specs:
Motherboard- MSI 790GX-G65
Video Card- XFX Radeon HD 4850
Processor- AMD Phenom II 955 Black Edition
Hard Drive- Maxtor STM 3200 internal hard drive. (IDE)
Sound hard- Sound blaster X-FI
Memory- OCZ 4GB Reaper
Power Supply- 750 W Powercolor