Thanks for you answer.
My BIOS says IDE, RAID or AHCI. The readme doesn't state exactly IDE, so I don't know if it is supported. I can't use RAID, and I installed Windows 7 with IDE set before I added the last two disks setting RAID.
Should I disconnect the RAID-disks, set AHCI, do the upgrade and set RAID again? Or will that f... up my Windows7?
Or should I try the same with IDE instead of AHCI?