Hit the Program button. Hit KG mix (F2 softkey) then Zone (F6 softkey). There are 4 zones - just curssor down to zone 2 and scroll thru the samples to add it to the original sample (zone1).[/color]
you can also play another program simultaneousl by selecting a second part in the bottom section.
you can blend drum machines with kits easily like this.
This only works if all your kits are set up to GM drum numbers