I'm no expert and I'll admit that I've never even touched a power commander,just looked into it before I decided to go with something a bit more programmable, but, if you've got the tre, then I'd assume that you're gonna be running off the the 5th gear map no matter what adjustemnts you make. So I guess, just load the map to the PC and let er run. It should still run the same...only you'll JUST be useing the fifth gear map. Same as you were.