We are currently hosting the largest HAK files externally for anyone that might encounter an issue with the auto-downloader through uploaded.to.
Here are the links for it:
http://db.tt/RVUrW5k
http://db.tt/2wSmhtO
http://db.tt/xm5KDsW
http://db.tt/YinkrjS
http://db.tt/CLMyTZP
You need to use 7zip to unarchive the files (you must download all 4 files). You then place them here -> \My Documents\Neverwinter Nights 2\hak\