Well the game is 32bit and runs in 32bit already, right?
I have a GT550 that I could use as a PhysX processor, but nothing I tried would allow me to enable it in game. This card was released in 2011 and should be age appropriate. I use an AMD RX580 right now, and I was able to install the nvidia card with the drivers and all that running without removing or disabling the AMD card. Windows 7 came out in 2009, so maybe I wouldn't need to hunt down a copy of XP.
Maybe some other time when I'm feeling zesty I'll load up a VM and try installing 32bit XP and the what not and see where that gets me.