The Windows Vista driver development for the GeForce 8 cards seems to be stopping with the ForceWare Release 169, the most recent of which is the ForceWare 169.44 driver. NVIDIA has restricted the use of Release 174 ForceWare driver only to the new GeForce 9 series cards. The recently-released GeForce 9600 GT is the only example of the new card series. If you try to install ForceWare 174 using a GeForce 8 series card, it won't allow you to do so, stating that no compatible graphics card were found. However, it is very simple to hack the driver to allow its installation with a GeForce 8 or older graphics card. Let us show you how to do it and what you can expect to gain from it. Here's a quote from the editorial :- Link : ED#85 : Getting NVIDIA ForceWare 174 To Work With GeForce 8 Cards
I have not tried 174.70 beta yet. Did NVIDIA include support for the GeForce 8 cards? I guess they would eventually allow it for the G92 cards at least.
To be honest i dont remember, i use laptovideotogo to find all the most recent betas and they always offer modified .inf's . In this case I believe it was the original .inf I have moved on to 174.82 beta's for Vista X64