Everything but critical fixes is off by default in CCGEP (see "Aways enabled Fixes and Enhancements"). That is done so because most people seem to be content with GTR2 as is and I do not want to surprise them. So no flat spots by default, no dirt pickup etc - most folks don't care about such stuff. The other reason it makes issues easier to catch. Game exploded? What did you enable last?
My idea is that eventually modders will include CCGEP settings with their mods, but we'll see if it ever happens. There should be no behavior changes unless you enable them - everything is off. HQ only enables 2 visual features, not behavior/physics/FFB etc.
At trackaholics, I share "CCGEP Patches". Those are some files that enable all features in concert for certain mods, cars, but not for 2003/2004/PnG.
Let's not pollute HQ thread, we can continue here:
https://www.overtake.gg/threads/mod...e-crew-chief-gtr2-enhancements-plugin.250134/ but I suggest you to take your time to learn the plugin - it's entire new world, it's not GTR2 anymore - means a lot to learn.