Kegetys' DXDLL

or above, or a Radeon 9 Series). This replaces standard BIS files, so be sure to back them up (ones within /bin and /dat, mainly).
This is the esteemed DXDLL from Kegetys, which enhances the graphics within the game through use of post-processing and by forcing trilinear filtering (because of this you'll need a GeForce 5 Series