Approaching the 10th anniversary of this post. Just wanted to lay down this information for future internet adventurers:

  1. Opcode Galaxy (& Galaxy + Editors) appears to only have a librarian for the TG33, no editor.
  2. Emagic SoundDiver (the last public beta) does contain an adaptation for the TG33 which has an editor. (edit: synthseal made a custom adaptation but it appears lost from the internet)

I like that emagic allowed its adaptation creator to throw ‘credits’ and ‘greets’ into their help system (& then even translated them into other languages):

Picture 9

Here’s the editor:

For anyone still grappling with OP’s question: