These are Beta drivers that are to be released. Unfortunately there is no description or changelog available as of yet. These drivers have been spotted at NVIDIAs developper website.
The driverset supports pretty much all modern GeForce graphics based graphics cards. So it is very unlikely that you'll need a modded .inf
- GeForce Desktop (301.40) NVIDIA Certified
- DriverVer = 05/09/2012, 8.17.13.0140
- CatalogFile = NV_DISP.CAT
- Driver 301.40 is r301_07-60
We have a discussion thread open on these drivers right here.