This Editor can open any ERF and both Versions (v1.0 & v1.1). You can add, delete, export any files and you can merge 2 ERFs together. If you try to add a file specific to nwn 2 like the new .trx files into an v1.0 ERF you'll simply get an error. If you get any error adding an nwn 2 file to an v1.1 ERF just add a comment and I'll fix it for the final version :)
In the final version you can create patches, so if 2 people work on the same module and they edit different areas/scripts/whatever they can create a special ERF containing only the altered data and a list of ERF ressources which have been deleted.
I'm from Germany so please excuse any spelling errors I've made ^^ (didn't release any english content yet...)
10 - A Masterpiece, Genuinely Groundbreaking 9 - Outstanding, a Must Have 8 - Excellent, Recommended to Anyone 7 - Very Good, Deserves a Look 6 - Good, Qualified Recommendation 5 - Fair, Solid yet Unremarkable 4 - Some Merit, Requires Improvements 3 - Poor Execution, Potential Unrealized 2 - Very Little Appeal 1 - Not Recommended to Anyone