Aerodrums and Aered forums

Hi, I haven't bought the kit yet,but it's a matter of weeks before I do :-) I hope to use it for the Playstation 3 game Rockband 3 as Pro Drums, which accepts MIDI drums. I'm just not sure how to get the MIDI feed from the computer to the MIDI input on the Rockband gadget? I assume I need to get a s...