Use Girder (
www.girder.nl)
I think the newest version is shareware but the slightly older version is still free.
It is a complete remote control program, I have a Winfast TV tuner and remote, and I can do almost everything with the remote (winamp, mouse moving/clicking, volume....)
Anyway getting back to the point - you can set it up to work with BSPlayer fine, I have 8)