If you're doing a clean install then everything else will be gone.
Make sure that you have access (a backup on an external media) to any personal stuff you want to restore later.
(Why not download the .iso file, burn it yourself and save some money.)
Nah, I'll probably get the disk.
I'm still not sure as the best way to uninstall Preview copy clean so HD is ready for the Validated Windows PRo install.
Didn't quite follow your response, sorry
