Thanks for replying Rikki. I have two scenarios:
1) Playing the accompaniment from my computer using SynergerGS and lead voices from my Roland. This setup would be similar to yours. I am playing my Roland live. I will try setting local off and triggering the melody from MIDI channels 1 to 4. This sounds like it will work. Appreciate your help. Will try this on the weekend and let you know.
2) When I get some good quality lead voices, I will not be using my Roland's voices. So everything will come from the soundcard. When I do this, the selected right hand melody voice plays in the left hand chord. When I set this up my MIDI output ports look very similar to this : http://www.1manband.nl/tutorials2/setting.htm.
All the output channels are set to the SB live synth card.
Starkeeper