Wadupdater works for all wads, individually or for all track wads at once.
to james: No and no, because 1 GP4Master had not been created by Jon but by Sven and Sven left the scene long ago and 2 because Jon's tool, Carset Creator 4 is lost and Jon have new plans not concerning any new Carset creator version.
And 3 none of those editors are working with the patched version.
But what do you want to change with such a tool, there's maybe another tool doing the work...