I was under the impression that LaTeX was just TeX bundled with styles and functions to make it more user friendly. I take it from the discussion above that this is a bit simplistic?
How easy would it be to convert a dvi file to TW? Don't know if a dvi maintains text in a manner that could be eaily converted to something editable but it would remove the dependency on packages. I imagine getting it to !Draw would be possible, could it be taken from there?