Note: This is NOT CREATED BY ME. Since the Vault has gone down, I noticed this tool isn't available to download anywhere, so I'm uploading it. This tool was created by Tanita, and all credit goes to her.

NWN2Packer is a tool for packing ERFs, Haks and Mod files. It's incredibly well made, can help rescue and deal with even otherwise corrupted modules, and is just generally a tool that every developer should be using.

How to use it is pretty straight forward and self-explanatory.