To the repaintinfo files are specific to the vehicles since they reference the vehicles materials. In download with the comfort class templates you will find the ComfortClass repaintinfos.
You can also copy the cfg lines too into your mods cfg and have the all together.
As for a guide this is the official repaint guide. The process is correct but is missing some vehicle names from the more recent DLC https://steamcommunity.com/sha…iledetails/?id=1687469689