The only performance SOHC PCM other than the R/T units were reprogrammed ones by Howell: The AF/X units.
But re pinning the '00 haness to a 1gn Mopar PCM might yield better results than either sourcing an AF/X, or the R/T. But if a Mopar PCM is not currently in your possession, then the offer of the R/T pcm would be my next step.
'01 up IAC are only two wires.

Bill
Probably shouldn't listen to anything your penis says, that guy's a dick.
Patience, of course, is a very powerful weapon, but sometimes I start to regret that it is not a firearm.
Too much time spent here is a sign of a bad case of Ownaneonvirus.
2000 Neon MTX swap with '02 R/T PCM
1999 neon coupe 2.4 swap