I see a couple potential issues.
The wiring for one. If you have both FSM'* check the wiring closely. I don't believe it to be the same. That poses a problem because your ecu is located inside the cabin on both those years and your interior wiring is large octopus that stretches from your headlights to taillights and all stuff in between.
The swap is easier with a 96+ as the wiring harness is mostly in the engine bay with the pcm.
Realizing you have the 92 complete is a good thing, let'* hope the wiring schematics are kind to you.
00 Regal GS: All kinds of cool stuff.