Musikman,
First download version 6. The ins file feature is already there in your version 5 but there is no sequencer! Without the sequencer you can't compare it with BIAB, Jammer and XG Works.
The best way to get a Cakewalk ins file would be to ask for it at a forum dedicated to your instrument. There is some info on how to edit the ins files at
http://www.1manband.nl/ins.htm .
Jos