Here's some screenshot links from the upcoming Item (UTI) editor, shown editing a lightsaber from the module sta_m45ac_s.rim:
When you double-click an existing row in the Property table, you get an editor:
You can also add new properties by double-clicking the "*" row header:
Testing is just about complete - thanks to T7nowhere for his testing so far!
If you're interested in helping, email at the address in the readme.txt file.