It’s almost impossible to find a cheap USB RF (radio-frequency; wireless) remote. Yes, IR (optical) remotes are a dime a dozen, but I don’t like having to be in line of sight; endless pointing and re-aiming to make it work. Also, many a time the projector screen is in the way. Either way, RF remotes are rate or expensive. Logitech makes one for $200. But I stumbled upon this one made by Griffin, the Airclick for PC/MAC and it costs $8-$10 shipped. AirClick on eBay
I got a little DLL that made it work in winamp. But then Jared programmed it up to work in… well just about everything else: Media Player, VLC, PowerDVD, anything that uses windows Hotkeys, like they keys on a multi-media keyboard.
So go buy yourself one, if you like, Then download this little file and put it in your startup.