Yeah, oh may want to disconnect battery first
Passenger side kick panel, fairly easy to remove. Once that's off you will see the ECU thingo, pull that out and there should be a small panel with some alan (or maybe torx or hex) key bolts on it, should be on one of the big faces of the ECU.
Undo the bolts, open it up and the memcal is just in there, take it out and put in the new one, then go for a test drive
I'm going straight off of memory here so not sure exactly what bolts they were. Pretty sure they were six-pointed stars