I think it's possible. But I'd have to locate the stuff in Geiger's SNES9x Debugger because apparently that seems to be the base for half of the techs. ALSO!
PS: The stuff in geiger's snes9x debugger, the cd45ed or w/e the spot is, is the graphics for all of the techs and how they perform. So, it probably is possible to have completely swapped techs, except some of them have more data then others, so probably not all of them can be swapped. So i'm guessing that in TranslHextion that the stuff in there is what animation that the heroes do, what SFX, and where they are to start off the tech and who's involved. So apparently there's like 2-3 different things you have to edit to get custom techs.
Edit: Lightning's starts at CD45C1. I use that one as a tester.