Point your browser to roland-arranger.com, and find a pretty well moderated, comprehensive Roland site.

You'll find me and many others willing to help you out as much as we can over there. I don't post here often to save duplication of posting. Most of your questions will also already have been answered if you use our 'search' engine, but feel free to post if a simple search doesn't help...
An arranger is just a tool. What matters is what you build with it..!