This idea, if coded correctly, could make mods for TPT alot easier. I can't code, I'm only ten, and I make games and have my own website (http://robertgames.x10.mx/forum) so don't tell me to learn how to.
What this idea suggests is a new system to store TPT elements. To do this we add a folder called Elements.
Then we put some files (compiled code or something) and put them in there. Then TPT reads every file in the folder and puts them into Powder Toy. This could add a bit extra work on the element code though.