Default setup override

[Kyle Puttifer]

How can I force a mod to use a specific setup file? I changed the physics of A1GP 2010, from RFT to MMG. I then lowered the rev limit to 18,000 where it is supposed to be. Now the gear ratios are too short by default. I've rectified that and created the setup file "default.svm", but I don't know how to force the mod to use this file or where to put it.
If that doesn't work, where should I put all of the text from this file? In the HDV?