During install, I checked show details, to see what files were corrupted. I had to download a few times to get an uncorrupted file, especiallly the prc_consortium.tlk file.
I used internet explorer 8, with Windows Xp. I also downloaded the .rar file just to see what files where actually supposed to be there, but the .rar comes with no notepad to explain where to put files. I do have some knowledge of where to put stuff, but some files extension are unfamiliar to me. I don't claim to be an expert here.
I also had to update Java and Microsoft.net to get the Character Creator to work, which I did, and now it is functioning. See
http://www.nwnprc.com//nwn/english/content/installation/jcc.htm for CC install instructions. This link should be included with download, as who would know how to add the needed files in the settings tab.
I have yet to run through everthing to make sure it works, but I will respond with any errors or fixes I attempt. Perhaps some notepads basically stating what files are included, and where they should be placed.
NWN Manual link, which I didn't look at, has all info needed.