Succesfully upgraded to ixtreme 1.51 using JF, fairly straightforward. It was more difficult getting windows to recognise the drive using VIA chipset.
Had to get drive into modeB 1st before it was recognised, then JF could not detect the drive on the left hand side under any of the port addresses.
But it did detect it on the right hand side as Windows had detected the drive ad allocated a driver letter JF was able to query the drive. Tested flash dump 1st, which worked, so went ahead and flashed to stock, then 1.51, all went smoothly. Tested with batman Arkham Asylum and FIFA 10.