Welcome, Zedian! Someone will soon give you your Gift Basket or Chocolate Jedi Medallion. This thread will most likely be moved over to the Swamp, but what comes to your question, I'm sure you can slow JK down by adjusting your graphics cards settings and turning both MipMap levels and Direct3D LOD to Best Quality and using some Anisotrophy level; if you have Nvidia based card then you might wanna download NVmax (
http://www.voodoofiles.com/2597)(remember) to install newest detonator drivers), which gives you ability to tune all these settings easily. Of course little experimentation is needed, but I'm sure that you can play JK after that even using higher resolution and possibly applying Anti-Aliasing. BTW, if you can do all this succesfully, could you send me (finnson@sabermail.com) couple screenshots of JK running with all those settings on; I have old Riva TNT, and before I buy totally new PC, these kind of extreme settings are still future for me. ;)