If you're using GpxPatch, the wing angles/gear ratios for CCcars are stored in magic data [.md (GP3 1.13) or .md2 (GP3 2000)] files. The magic data settings overseed the ones coming from other utilities, like GP3 CCsetup Editor.
You can edit these files with the common wordpad and inflate them in the track .dat files that you want to use, with Cmagic (GP3 1.13) or Cmagic 2000 (GP3 2000) tools. With the same tools you can also extract magic data from the tracks.
My suggestion is to get them from your prefered tracks, to edit them and after saving your modified files (don't forget to do a back up of the original ones), to insert them back in the same tracks.
In both the types of magic data the rows relative to the CC setting are the very first ones, but whilst in .md2 files the settings are stored as they are read from the game, in .md files they are increased by a 151 coefficient. To do an example, if you're using GP3 2000 and you want to settle the forward wing angle to 4, you has just to insert "4" where you read fw (for times, as GP3 2000 let you to specify different setups for race/qualify dry/wet conditions) of .md2 files, but if you're editing .md files you has to insert "155" ( = 151 + 4) in the fw line.
This is what Jackie meant. I hope my explainations were clear and exhaustive enough.
Happy to know that you will publish your work!
Gabriele