My friend just bought a Roland TD-20 Vdrum kit and wants to record midi data on his old Mac Powerbook G4 running Mac OS 10.2 and Cubase SE. What will he need to get the midi data from his V-drum kit out to the mac and vice versa for playback purposes? I've got a midi to USB cable, but this particular one only works for a PC. I know there are midi to USB boxes out there but is there any way around that on a mac? He's trying to keep it as cheap as possible.