Well, looks like Im going to be inlisting in your guys' help for this again. Whats funny is, this time Im doing it the easy way, piggyback installation (for a friend) and it actually seems harder for me because I keep thinking of the way I did it, going for stand alone. So allow me to bounce some thoughts off of you, and retort back if this is correct or not:

This install will only be fuel for now. Later it will be spark and fuel, Stock ECU will still be in place.

The stock ECU should control:
Tach
Speedo
Cruise
Fuel Pump/ASD
IAC
Rad Fans
Spark (until I hook MS up to it)

Meaning, I shouldnt need to use the wires from the MS on those, right?

Since the stock ECU is still going to be controlling spark for now, I would need to Splice in the temp sensors, instead of cutting and making a new harness like I did last time. Can the stock sensors share a connection with MS and PCM, or will I need to actually get the GM IAT and CLT sensors and connect those to the MS?

Currently, this vehicle has no WBo2, in fact he was talking about getting a NB02 (I advised against this). Should I just tie the pink o2 wire from MS into the oxygen sensor signal wire, and set it up appropriately in the settings?

I think thats it for now, But Im sure Ill have more later. Thanks in advance.

95 Eclipse GS: 10.5:1, Crower 2's and MSII
186 WHP - 150 WTQ
14.697 @ 93.85 MPH......Gone, but not forgotten
99 420A Avenger: Given to my sister
99 GS OZ: Sold
03 Evo 8: Family Car with balls