Dave Smith Instruments SYNTHESIZERS

hello everybody,
I've got my PEK since few days and I'm struggling with combis and 
sequences ! Manual is not very clear for me, especially the way of 
using the 4 sequencers and combis.

I use Cubase LE and (for exemple) in my arrangement I would like to set 
midi tracks like this :
- midi track 1 route to : PEK's midi channel 1, to play program 4)
- midi track 2 route to : PEK's midi channel 2, to play program 115)
- midi track 3 route to : PEK's midi channel 3, to play program 37)
- midi track 4 route to : PEK's midi channel 4, to play another 
program's sequence

How can I set the PEK for that ?
Also I noticed that sequences play automatically as I start playback in 
cubase ! Is it possible to avoid it ?