Elektron Musical Instruments

Hello,

I know that kits can be changed using a MIDI "Program Change" call. 
Anyone knows about changing a song with MIDI ?  I ask this because we
use the MachineDrum live and we need to select the song automatically.
 For the moment our keyboard/machinedrum player has to change 4
devices (SID station, MS-2000, Yamaha 03-D and MachineDrum) between
every song.  We know we can reduce this to only 2 devices if we use a
MIDI foot-controller, still it would be perfect if the MachineDrum
changed its song automatically ...


Thanks in advance for your suggestions !
Camille