Please be advised that installs from these alternate locations don’t use the older method of installing the game. They install the program per Windows proper location, eg. C:/Program Files/NWN/, or similar. This wouldn’t be an issue except that most of the installers for haks and systems assume the old school C:/NWN location.
So to make your lives easier, choose Custom Install and place the NWN folder at C:/NWN or top level. Once installed and you’ve installed the haks and resources from our site, you can move the directory to wherever you want on your computer.