Bob
If your unit has a remote jack like mine does, here is what I think we need to do. Let me build one first to be sure.
http://www.bocaboard.com/data/noslac...seControl1.JPG
start with a 1/4" 3 circuit RC jack
http://www.oselectronics.com/Images/pg_107/30-401.gif
1 toggle switch with normally open/normally closed contacts
2 push buttons with a set of normally open and normally closed contacts
http://www.bocaboard.com/data/noslack/diagram.jpg