1. There was a second/third thread (one after D2:ED release and two after DSK release) about the mod tools, and, AFAIR, it was clearly stated there will be no tools.
2. It exist but disabled and NEVER will be enabled (there is a thread about that as well)
*.dv2-explorer which enables us to extract and (re-)import resources would be a great tool to enable modding.
Community already made a dv2 packer/unpacker, but Larian don't like the community's initiative and bans every mention of such tools on this forums. "We don't want to make tools for the game and we won't allow anyone to do so!". I understand why there is no official modkit: game's engine is one big pos, it is not really mod-friendly, also, game is not so popular, so, it's truly not worth to spent precious time for tools. But I totally don't understand why prevent all community's initiative. One of the reasons was: "Oh noez, they all gonna change the dv2-fiels and spam us with invalid bug reports!". Yeah, it is so hard to make small support-tool that calculates md5-hash of all dv2-files.