I'm using a Contour Shuttle Pro to control RR, and all other applications on my CarPC. It can easily be configured to send any key or key combination, and it automatically switches profiles between applications. The keystrokes, in turn, can be defined in keytbl.ini to control almost all RR functions. The only downside to the Shuttle Pro is the size. Google their website for more information -- I think it is a very good solution.