Bachus,
Check my recent post titled Hypersonic2 demos,
also check posts by Frank Rosenthal for FLR2004, FLR2005 systems, as I think Frank Rosenthal is the first or among the first who started this softare arranger thing here. He also uses a software harmonizer.
Also check posts from Bluezplayer (not sure about the spelling, think I got it correct).
Also Bluezplayer had a very nice tutorial for software arrangers in Club Chops forum, can't seem to find it now, perhaps they relocated or closed.
Good luck,
Theodore