Been playing nwn for months , just finished Tyrants of the Moonsea, can not instal Seige of Shadowdale or Crimson Tides of Tethyr, on a mac , see they are downloded but cant install them
please help ???

You should have a Neverwinter Nights folder in your Documents area. Downloads go in here for NWNEE, rather than the install directory.

Once you've extracted the archives, move all the .mod files into the Neverwinter Nights/Modules folder, the .hak files into the /Hak folder, and the .bmu files into the /Music folder.