Hi Porosus,
Welcome to Techimo.
For motherboards with Highpoint controller.
1. boot in to BIOS by pressing Delete at startup.
2. go to SOYO Combo Feature, and Enable Onboard IDE RAID, then Save and Exit from BIOS.
3. boot to windows and after windows prompts, that it has found a new device, install "High Point 372" drivers in SOYO CD. this folder can be located on the SOYO CD in \Raid\HPT372.
From
http://www.soyousa.com/kb/kbdesc.php?id=116
Question, Why put the drives on IDE 3&4? If the array works on 1 & 2 why not keep it there?