Internal map script Question

So I had this idea to examine the guts of my map in WinMPQ, and extract some files and open em up to find my script. I noticed that its stored in both war3map.wct and war3map.j? I did a few searches and I can't find much information on these files..

I'm guessing the war3map.wct and .wts is editor data, and war3map.j is the actual script the map uses (correct me if I'm wrong.) My question is, instead of editting my script through the editor, could I just edit the war3map.j directly and import it into my map? Because if so that would be sweet.

Yes, with JassCraft or something like that. Search for it/them at the resource section under Tools.

Though whenever you save it overwrites it with generated code from the JASS WE knows is in the map. Use an import function or something in JASSHelper instead.