Help: Softmod NVS 4200M to GT 520M

[angerthosenear]

I have a NVS 4200M that I would like to softmod to a GT 520M to regain PhysX.

Apparently with the latest drivers, I can no longer use the NVS 4200M as a PhysX processor (like I have for the past year). I wasn't supposed to be able to do that anyways as seen here:

Tech Specs | NVIDIA

Anyways, I was hoping this guide work work (but of course the opposite direction):

Tech ARP - NVIDIA GeForce To Quadro Soft-Mod Guide Rev. 4.1

But it doesn't.

What else could I try?

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I've been messing with .inf files for a while now, still no luck.

This seems to be the inf file determining what is installed. If it is there/untouched, I can install fine. If I change the 520M values to match those of the 4200M I get a 'Standard VGA Graphics Adapter' already has the latest driver message.

https://dl.dropbox.com/u/19774443/ShareX/2013-09/NVFMn.inf.bak

Just take off the .bak bit and open with editor of choice. I'll test anything..

Thx

-atn