What can be changed in the TCM?

What all can be changed in the TCM with EFILIVE V2? I'm getting ready to undertake a DMAX swap to an older body style and trying to figure out what all can be tuned. I talked with BRAYDEN earlier on the phone and he said he could write me a custom operating system for the TCM to do what I want, but I was checking to see if EFILIVE would allow me to do this myself? What I am after is to have the hardwired OD/LO which I had flashed into the TCM by the dealer while my donor was still together, and to have a hardwired tow/haul switch and seperate indicator like the OD/LO has. I'm trying to eliminate the BCM and DMAX cluster from the swap is my goal. I know BRAYDEN said he could build me one, I'm just trying to see if it is something I could do myself before I send him the TCM.