Mp3 Player while navigation

[msrox]

I am looking for a Mp3 Player which long-press remapping hardware key.
I want to change tracks (next and previous) while I am using gps navigation in my car.
It wiould be great If I can e.g. change the track to next one by long-pressing e.g "window" hardware key.

Any reply appreciated.

Thanks in advance.
msrox