Its a simple case of someone not using the mod installer as provided by the source code package.
This way people get their hands on content that they did not pay for (no NW CD key check)
Ill probably send a report to moddb, if I care enough, at this stage I dont think there is much problems, this mod is very much in it's starting blocks.
If anyone speaks german properly, it would be cool if you send the guy a message explaining not to distribute a rar file or so, but use the provided installer in the source code package.
Cheers.