remap volume keys

[Guest jebise]

I'm wondering if there is a app/registry that will allow us to remap the hardware keys. On my old phone and my brothers new backberry the volume keys double as next track and last track. Hold down volume up to go to the next track and hold volume down to go back a track. I find that very useful rather then taking the phone out opening the screen unlocking and then skipping.

So is there a way to do this?