Last night, NVIDIA released another driver for both Windows 2000/XP (no Windows x64 version once again it seems). The changelog only seems to indicate a small change for the new Tomb Raider game since the last official release, but the guys over on the forums at NVnews seem to really like it - perhaps some kind of placebo effect but I am using them now and haven"t had any problems.
These drivers are not WHQL signed and really should be considered beta, they can be easily installed as they come as self-extracting/installing .exe file.