What Mark said. There's a good community for VoiceLive users available: The VoiceCouncil Forum. Here you can find a lot of useful information.

Am I right that you asked if you can run a pre-recorded (dry) vocal from RB to the VL2 and record the harmonies? If so, the answer is yes (it should be). It works for most DAWs and I see no reason why it wouldn't in RB.

Unfortunately I don't have the time to check for you right now; kinda hectic right now (I have a gig tonight until 1:30 AM (home around 3:00 AM, a recording session in a pro-studio tomorrow (for my own CD ) , starting at 10:00 AM and tomorrow night another gig) It's tough, I know, but I think I can handle it