So, my game freezes every time I try to re-enter the forest of tethir, or areas near it, Like small teeth pass. any ideas what I should do? I have not had any other problems with the game. Thanks for any possible help.

Post your Weidu.log here.

Any info? OS, mods?

I repeat: post your Weidu.log here...

Here

// Log of Currently Installed WeiDU Mods
// The top of the file is the 'oldest' mod
// ~TP2_File~ #language_number #component_number // [Subcomponent Name -> ] Component Name [ : Version]
// Recently Uninstalled: ~DDRAWFIX/DDRAWFIX.TP2~ #0 #0 // DDrawFix -> Force DirectDraw Emulation: v1.0
~DDRAWFIX/DDRAWFIX.TP2~ #0 #0 // DDrawFix -> Force DirectDraw Emulation: v1.0

Do you have an nVidia 8 series graphics card? If not, you do not need ddrawfix.

Also, you have no fix pack installed. Install the BG2 Fixpack.

Seems to work, thanks!

Wait, now this is strange. The areas I mentioned now work after I installed the fix pack. Yet, I haven't played in a while and thought tethir was the final area. Well, I remembered that I need to travel to the Underdark exit and lo and behold, it doesn't work. Does the same exact thing. Other areas work fine still.

I have a window's seven. I don't believe it is possible disable draw distance on those.

[SPOILER]
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Tethir is not the final area, but it is the entrance to the penultimate final area of Suldanesselar. You do NOT need to travel back to the entrance to the underdark except to give the Rhynn Lanthorn to Elhan. Once you have given that to him, he reveals the entrance to Suldanesselar in Tethir.