Sorry for the late reply - haven't been on here much lately.
To clarify everything, I put a NEO into an R33 and below is a list of what I'm using and how I got things working..
NEO Engine and turbo
NEO injectors & NEO injector loom plugged into R33 engine loom
NEO coilpacks and NEO ignition loom plugged into R33 engine loom
R33 throttle body and AFM plugged into R33 engine loom
NEO CAS plugged into R33 REWIRED engine loom - I needed to reverse the wires here
NEO VCT solenoid plugged into R33 engine loom - needed to bodgy the wiring here as the plug was different
NEO idle control valve plugged into R33 engine loom - again, needed a new plug
R33 engine loom plugged into R33 chassis loom
All run by a R33 ecu plugged into R33 chassis loom
I hope this makes sense. Let me know if you want pics of anything - I think I've got a few kicking around of the various connections ect. Also, all R33 parts above are RB25DET parts, not non-turbo parts..