Just be VERY careful. Read the instructions several times before so you get familiar, and do exactly as it says!
When I hacked mine, I did something somehow at the end, got confused with the key strikes, or something, when I took the power off and turned it on, the keys had changed their function!! luckily there was a reply from someone who had the same problem and actually figured which key is which....
At the end, I hacked mine and the keys were back to normal.....
The Line Out option is just all the volume up and no Bass; i haven't used the new functions yet........
Ben 8)