Where would I find these values for an existing mod to input into the Suspension Geometry sheet. I have looked through the HDV file but have not found the values.
The pushrod points can be found in the hdv, in the tire sections. All other points can be found in the pm file, if the mod still has one. Taking the suspension points from the chassis.ini is possible for some of the points only.
If the mod you are using is a conversion from rf1, you can use the rf1 hdv and pm file. And you can use the tool, that extracts the needed values from these files, that you can paste them into the physics spreadsheet, that is on the website of Chris (redapg): http://meetme.bplaced.net/rF2_onlineTools/