My car is like my user-name, 93 Accord SE (4 door sedan) LOL! Before the swap, everything was working fine like a normal car should be. However, when I did the swap(professonal shop did it), I believe I wasn't able to get out of "P" even with the Accord TCM but the "D4" indicator lights up. When I put the Prelude TCM, I still couldn't get out of "P" and "D4" indicator doesn't light up. But now, with your genius idea, I can get out of "P" with the Prelude TCM and Accord TCM.

About the shifting problem, that's in another thread. But here's a short story of what happen. The reason why I bought the Prelude TCM because I wanted my motor to shift correctly and redline at 7200rpm(prelude shifting and redline). When I got the TCM, everything worked great such as the correct shifting points and redline at 7200rpm(exclude the can't get out of "P"). After a Year when I tried to clean my throttle body with some Intake-Cleaner, my motor started to rev UP and DOWN after engine warm-up("N" only). One months later, I replaced the TPS and I guess everything worked fine again. Ever since that happened, my motor was shifting differently in RPM/Speed, so did my Redline stopped at the Accord's 6300rpm. I also bought another Prelude TCM just 2 weeks ago and it still does the same thing, nothing solve. So what the hell went wrong?
Sorry I make the story longer than short.