Basically anything in the assets -> tinker -> textures -> items -> materials folder that I think is necessary (probably won't do nuggets and small stuff like that, but yeah :D)
So if you're thinkin' bout adding some pics, wait till I've got my item pics up tomorrow morning.
I'll be signing off for the day in 9 minutes, so here's the game plan:
TrillingFlute: Stay beautiful.
ThermX: See above.
Argentum: Keep calm and Nazi on.
Satherian: See if you can get the template from the tekkit wiki that allows you to do furnace recipes. Also, if you could reverse-engineer their recipes enough to make a tool building recipe thing, that would be simply awesome (though you'd likely have to make tons of templates.. Perhaps it would be better to just use pics of the recipe :/)