How to start XBMC from remote control!

Hi all,
I've just switched over (probably forever) to XBMC (from windows media center). I've added all audio/video content into XBMC library so as to play/pause/stop etc using my remote.
PFA picture of my remote and the marked windows media center key on it. I want to start/initiate XBMC with that key or any key using the remote. If i press that key the default media center oif windows opens up (which i don't want to use)
Please help!
Tia.

My remote: