urggg... where to start... Well, I was starting to put together my pics today of what I have so far for a new thread when I'm finished... Here is what I have so far.
Amp board- I like to get this set-up perfect with no "wrong wiring" and triple check everything BEFORE I just drop it in the car and hook it up.

Looks Good! 200W RMS to 4 corners- 100W RMS to the sub! (400W max and 200W max respectively) Speaker wires in place, RCA's/Amps linked! All ready for a Power, Ground, and Remote-on line!
Preparing the car!
I first place a 150Amp fuse within 12" of the battery using 0-4 guage wire.

I run BOTH Positive AND Negative from the battery in through the perfect hole made for us by the good engineers at GM.

This runs through to the inside opening, where you can remove this carpeted door sill, and easily run all your wires down the side and into the back!

Powers IN~

From this head unit, I ran the RCA's and Remote line back around the steering wheel, and down the same side as before (All down the Drivers side sill!)
I ran the Sony's Keyed/Ignition/Remote switch into the console-armrest so I can put a switch in it- then to the Constant 12V wire. This is to turn the sound system on/off without using a key in the ignition.
(Sorry no pic yet! If I had one- it would go here!)
Where did I go wrong?
Here! These are 14 year old Kicker 4"s -they went in quickly, and I found out after the install- one was blown! I had also put 6x9's in the back (They were 14 years old too and hit the trash before I got any pics!)

The 4" kickers fit very well.
But I found these Pioneer sets at Circuit City's Clearance sale ($21 for the 5 1/4"s $80 for the components! -Not bad!)

Size was going to be a factor

The 5 1/4" seem to fit ok- plus they were very thin! Bad part was there 25W nominal rating.

I tried the 6 3/4" in the bose enclosure-

Not gonna happen!

Not even Close! -in order to place these in, I'd have to eliminate the Bose and make my own enclosures. Maybe later!
The dremel was used and the 5's slipped in nicely- and were shallower than the kickers (which you could feel from the grill side before!) This made me a happy camper!
Then the 6 3/4" mids went into the back, The chop job I did to get the 6x9's to fit came back to haunt me...
It fit's ok, but there still is need to fill the gaps and ported hole.
The 10" P2 Sub is rated 200W nominal 400W max- it may not look like much from the top...
But from the bottom, It puts the bass right through you!
I may have to get a bigger Rockford Fosgate Mono Amp, I'm only running Half what it can handle!
...Then I could bridge the pioneer amp and go 100W RMS per side just in the back for the components, and use the small Rockford to just power the fronts! "Woah!" but who knows...

Everything is a mess, and not totally put back together, so no pics of the finished product yet- maybe after this weekend!
Anyways, the wife came down and listened to it, and said "It sounds great! You don't need new front speakers."
Her hearing is better than mine, so I'll take her word for it... for now... I can always go bigger after I BLOW these up!