I have done it, the new emm must be the correct model for the engine it's going into. Connect the laptop to the engine with the existing (old) emm & copy the configuration file from the old emm. Fit the new emm & copy the config file . The software has a utility for the whole process with step by step instructions. The entire job takes under an hour.
Rule#2: Never argue with an idiot. He'll drag you down to his level & then beat you with experience.
Rule#3: Tha' can't educate pork.
Rule#4: See rule#5