It turns out, there is a way to make the malfunctioning game use an older version of ATI drivers, without having to change them to an older version in the whole system. Now, I don't know if it'll work for every graphic card model, I have no idea if it'll work for Vista users (Probably won't), because I use XP. I tested it on a rather old card, my old Radeon 9550 256 version. Despite it's age, after a certain update to it's drivers NWN stopped rendering shiny water. And after a few more updates, games like Knights of the Old Republic 1/2 became unplayable. But then I came across this nifty file:
http://www.megaupload.com/?d=AVN8WAEV
Seems all one has to do (once you unpack it) is drop it into the main folder of the malfunctioning oldie, and that's it. The game will use an older version of ATI drivers contained within the file. Worked for me. NWN started rendering shiny water like it once did. To boot, I tested KOTOR1 and 2 with it, and they both work like a dream again now.
I take no responsibility for the file, and how it functions on your configuration though. It worked for me, but I've no idea if/how it'll work for other ATI cards. So use it completely at your own risk. Hopefully it'll help at least some folks, though.
