Right, I have one of these keyboards:


and, as it was designed for XP media center, which had media centre messenger.
Vista Premium doesnt have this, so it is a dead button. So, is there any way to reprogram the button so it opens windows live messenger instead. I'm guessing all youd have to do is accociate the button with the target link, but I have no idea how to do this, or if its possible.

Can anybody help?
Cheers