p.s. Clyde,

I should have mentioned that even if you don't want to make mod wheel changes for the dynamics, you still have to have the mod wheel turned up (you can give it a fixed value) for the other MIDI parameters to have much effect. This may well be the problem that you're experiencing. The current default for the mod wheel in Composer is "0", because the mod wheel usually has a very different function for other sound engines than GPO. So you'll need to at least set a constant value for it for any GPO instrument staff.

ttfn,
Sherry