So, I have this crazy ass Microsoft Natural Multimedia keyboard. It's one of those bent ones that **wont** break my wrists, althought it does, but thats another story.
The best thing with this keyboard is the set of multimedia buttons across the top. However, whenever I press teh Media button, I get Rhythmbox which isnt what I want. I want banshee. So a little terminal hackery...
sudo ln -s /usr/bin/banshee /usr/local/bin/rhythmboxAnd everytime something tries to run Rhythmbox, I get banshee instead. Theres no reason why you cant change banshee for any other media player, like Amarok or XMMS.
This is an official bug, it is fixed, just gotta wait for the release of the next version, which should be 6 months after the last. Not long left...
https://bugs.launchpad.net/control-center/+bug/4265