if you install with Windows 7 it shouls recognise quite a lot of drivers. To clear everything you need a copy of windows or your restore CD.
Format your hard drives using the boot CD's or just format in windows then install windows by booting with the CD in.
Failing that search the net for what hardware you have and find the drivers for it.
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Black Mountune ST185
Mountune enclosure and K&N57i
Milltek exhaust system including 4-1 manifold
Piper cams & valve springs
Remap