Yamaha DTXpress/DTXplorer/DTXtreme

I recently purchased a DTXpress II module but have not received it
yet. Currently I have the following setup:

TP65 x5
TP65s x1 
PCY65 x2 
PCY65s x1
KP65 x1
PCY150s x1


Is there any way I will be able to hook up all of the pads without
losing the choking capability of the PCY65s, or the 3 zones of the
150s and TP65s? I was considering also just splitting one of the
inputs to make 2 of the pads trigger the same sound. Will this work at
all? I'm trying to get the most out of what I have, any suggestions
would be great.