Fading question + wiring

I am putting together a basic stereo for my wife's car.  Here is what I have so far:

• Alpine CDA-9847 18Wx4 rms 3 RCA outputs
• Kenwood KAC-943 50Wx4 rms
• JBL GTO 926 6x9" 100W coaxial
• JBL GTO 426 4" 35W coaxial
• Sony EXM-302 90W rms bridged (had from years back)

Here is what I am adding to the list:

• JBL GTO 626 55W 6.5" coaxial
• JL 8W0-4 sub

The plan is to put the 4"s in the dash, the 6.5"s in kickpods in the front floors, and 6x9"s in the rear, stock location over the struts.  The Sony amp will be bridged to run the JL sub in a wierd 6 sided sealed box I am finishing up (1.05 cu ft, fits on the side behind the left rear wheelwell); it will be in the hatch ('96 Saab 9000). 

The question is: should I wire the 4" & 6.5" speakers together as the front channel?   If so, how could I balance them so one does not overpower the other?

Thanks much but I'm unable to change the plan knowing what I have to work with.  I do need some help with calculations here:  Wiring the 4 & 6.5 in parallel will drop the amp output in half and increase the resistance to 8 ohms, right? I would like to wire a resistor or something in between the two speakers outputs to drop it back down to 4 ohms, restoring my amp's power.  Is this feasible?

No, this is not worth doing.  Adding a resister will simply mean the resister will absorb 1/2 the power that you are forcing the amplifier to produce, and the speakers will function as if it was not there.  Simply leave the 4" speakers out of the system completely.  They will only cause nightmare problems for sound quality,  The 6.5" speakers are what you want to use.