can u chip pm6 for ls swap?

hi my friend has a 91 civic with b18 swap n he doesnt have a pr4 ecu but he has a pm6 and we heard u can chip those and run them instaed of running the pr4 where would i go to buy one pre chipped or what program would i look for if there even is such a program?do they sell chips already programed if so where i kno how to put the chip in i just dont have the burner or anything??

run the proper ecu on the engine it was designed for.

run the proper ecu on the engine it was designed for.
ya but is it possible?to use pm6 intill u can afford a pr4 we called the junk yrd for a pr4 n they found 1 but its 5 states away lol