OK, here goes. I started last Sunday, 7/06, about noon. Decided that today is the day. Took off the panels:

This is a '91 Integra BTW. In the pic above you can see the wires on the right for the proximity sensor, led, and valet switch.
Here is a pic of the 700IQ proximity sensor:

Here is a pic of the panel off, exposing the 700IQ and Smartwindows 2 and wiring:

Here is a pic of when I was "cutting over" the RS3, I was taking my time on this. Geez what a mess, my wife came in the garage, looked at what I was doing at this point and asked me if I knew what I was doing and if I would be able to finish it. LOL:

Here is another pic during the "cut-over":

This next pic I think was 5 hours into it, I was taking it sloooowly, routing the new wires around the old and making sure all the connections were good:

Here is with it ALMOST completed. Relay pack in place, RS3 unit plugged in and all associated harnesses attached:

Man I was tired, this pic was maybe @ 11:30pm. I was taking breaks here and there, browsing 12volt.com for other info that I needed. This next pic is more of a disappearing act. I made sure all my connections were in, nice and secure. The relay pack for the remote start, all the wires were soldered in. The rest-butt splices and a couple of posi-locks. Those posi-locks sure hold good !

Next pic is with the panels in place. Mostly all cleaned up, just needed to vacuum the wire clippings/strippings.

Next pic is of all the extra wire from the RS3, it’s in the box. The wires next to it, the 700IQ harness. That wasn’t nothing compared to the RS3 wiring.

Here is the new led, with the new “pen holder.” While we're on the subject of LEDs, my led was right on top/near the 508D-proximity sensor. It wouldn't go off/send a signal to the brain when I was "snooping around" inside....like half my body was in the car trying to set it off ! So, I tried relocating momentarily(the led), and yeah, it worked. Put it back, and no, didn't work. So I ended up drilling another hole elsewhere. How come when I had the 700IQ's proximity sensor there with the led right on top...it wasn't disturbed by it. It functioned normally, but not with the 508D. Are both digital? I miss the remote adjustablility of the 700IQ, but I now love playing with the RS3...

Why did I post this? To show my appreciation for this site ! ! Thanks to all the people that answered my questions and provided info. It only took me a total of 17 hours to do. Researched all the info that I needed. Took my time, did it right, didn’t half ass it. The RS works great, smartwindows works great, LOVE the two way remote !
I am open for criticism, hey...it'll help for when I do more installs. Thanks again!