If you aren't kidding about a Geforce 6200, it was part of the reason that the 1.1 patch included the Extra Super Low Quality setting. That was such a bad video card, it couldn't run the game properly outside of the tutorial caverns without the patch.
I'm not kidding, I'm getting a boss gaming PC for christmas (already got the ATI Radeon 5670, for $80 even!) but I don't want to wait till christmas to play it. Plus I have the Steam version which is 1.2_416 or something. It's 1.2 something, I always just played 640x480 max textures, and none of anything else lol.