You cannot hack the latest (post 098) versions of firmware. The Liteon guys did something and nobody (as far as I know) has managed to get around the protection. Even using the famous hack program doesn't work.
However, oddly enough you are able to roll back to an earlier version provided you still have the firmware (098 is best version). 098 was actually a good and stable version (prior to that we had the infamous red/cabbage patches and of course the now legendary jitters).
You can also search the web for earlier versions but this is more risky as you have to be absolutely certain yoou have the right firmware.