Update 2014-07-19: I found the solution. My original fix wasn’t even doing anything it was just using the 4x AA I set in Race 07’s Video and Language Options application. The real fix for me was upgrading drivers and then things started to work. Before upgrading my drivers NVIDIA Control Panel changes to AA didn’t appear to do anything and NVIDIA Inspector wouldn’t save my changes either. It just wasn’t sticking. After upgrading NVIDIA drivers it all started working. I used NVIDIA Inspector to set: Antialiasing – Mode: override; Antialiasing – Setting: 8x CSAA; Antialiasing – Transparency Multisampling: Enabled; Antialiasing – Transparency Supersampling: 8x Sparse Grid Supersamping (Sparse Grid is important, some things will still look jaggy without it); Toggle FXAA on or off: On; Anisotropic filtering mode: User-defined; Anisotropic filtering setting: 16x. Now even Monza 06 looks great which still looked poor after my previous fix. Good luck!
Race 07 NVIDIA Anti-Aliasing
I finally found a little bit better anti-aliasing for Race 07 from this post on Race Department explaining that you can achieve slightly better anti-aliasing by using Race 07’s Video and Language Options application and setting 4x AA there and then also using the NVIDIA Control Panel to set: Antialiasing Mode: Enhance. I also set Antialiasing – Transparency: 8x; Ansitropic Filtering: 16x; Antialiasing – FXAA: On. It seems to look better. Still, some tracks like Monza 06 have a lot of jaggies. I suspect it’s just AA-unoptimized old track code. If you have a better solution I’d be glad to hear it!