Connect your device with USB cable in Active Sync (XP) or Windows Mobile Device Center (Vista 32).
Open the Hard-SPL-V2 folder (thanks to Olipro) and run ROMUpdateUtility.exe.
Follow the instructions on the screen, check the boxes in step 2 + 3 and proceed with next & update.
In step 7 when you see the message Replug USB cable! in your device (8), unlug & replug the cable on the PDA.
When you see picture 11 press Finish and unplug the USB cable. Device restarts.
Οk, test it. First press & hold camera button, simultaneously do a soft reset. Don't release the camera button until a four colors screen presented in your device. If you can see this screen, you are ready to flash your favorite ROM.