Yes the forum is the best place for questions more people will read it.
I recon the problem is to do with the Raid. If you don't want to use raid at all you need to go into the raid BIOS on boot up (usually CONTRL & M when it boots) and delete the raid array. BE AWARE THAT THIS WILL DELETE ALL DATA ON THE RAID ARRAY SO IF YOU ARE NOT SURE WHAT ON THERE DONT DO IT!!!!!
Then you need to go into the bios and set the Motherboard Raid setup from RAID back to normal. This way you get up to 4 seperate normal hard drives rather than a RAID array. Windows 7 should install on that no problem.
Upgrade the BIOS and ask questions in the forum next time rather than the blogs area.