Putting System in my short bus, Need help
 

I'm hoping someone can help me build my system? i'll run down all the components 1st.
I bought a pioneer head unit that has 3 rca's out, front, back and subs
From there I'm wanting to go into 2 pioneer gm-d9605 amps.
From there I have two jbl 6x9's for the front
four jbl 6 1/2's for the middle of the bus and two jbl single voice coil 12" subs for the bass in the back. These subs have a a switch so you can change them from 2 to 4 ohms
this is where I'm lost. should i use 1 amp for the front speakers and 1 sub? ! amp for 4 center speakers and 1 sub? should i use on amp just for the subs? Do i run two sets of wires to the subs or 1 set and hook them up to each other? All the ohms and bridging yada yada has me lost? Somebody ?