Heh...
'Kay, here's the news. ./fixinstall doesn't corrupt files, so that wasn't the problem. It may just be the fact all the paths for NwN are wrong, or I misunderstood that part. Either way, just gonna clear all the directories and redownload most of my own NwN files and force someone to send me their nwn.ini etc if that doesn't work.
If THAT fails, it's a no go for sure.