Topic on Talk:Sonic Adventure 2
You can force any form of AA without issue with inspector. Just not FXAA
Using Inspector's Framerate limiter is also a VERY bad idea as it is very low quality and does not stablize frametimes at all.
You are better off just using inspector to force Vysnc instead with testing the amount of pre-rendered frames from 1-3. (As that CAN have an impact on frame time stability).
If you have a greater than 60hz monitor or a Gsync monitor. you are just better off setting your monitor to 60hz mode.