Umm, still makes no sense to me, unless you've got an old version of fl or something. At least in fl 12 it shouldn't matter whether you use Play, Engine, Hypersonic or Kontakt or whatever. All the channels are linked to the mixer the same way and can be changed to any mixer track anytime, and any mixer track can be routed to any other mixer track, although it does require some work to open the right effects in the new mixer tracks.
For me it's just; insert PLAY, load a stormdrum patch, route to the mixer by changing the number next to channel pan and volume.
What am I still missing?