Dave Smith Instruments SYNTHESIZERS

So I'm trying out using the MD as my main sequencer and it's playing  
my Evolver and my Voyager like a dream..

Only thing is I can't work out how to send program change messages to  
these, I assume it's specific to the device your trying to control..  
Does the Evolver only accept sysex for this or can the MD even send  
sysex?

Bit confused....

If anyone has a similar setup or can help I most appreciate it!

Cheers!