can it be set up for 87 than switch for 93 on track days for best prformance on bolth? gas is not cheap and I want to do the 03 explorer swap with 01 gt mass air, 3.73, 01gt trans j-moded, and underdrive pullies. the xcalibrator looks like a good option. but could someone tune it for what I want it too do? how dose it work? would I have the programs in my laptop and download the one I want too use at the time? I have no idea how this stuff works.