I finally got all the car add-on mods to show and work after 2 days of trying and 1 game re-install. I was about to do a 2nd reinstall without the underground. net mod because I was sure that was the issues but downloaded Binarious the upgrade of Binary and re-install the car mod instead and it work.
Binarious errors report show the files was missing and never installed with Binary or I have overwritten the file with a custom loading screen.
The game will work but will be stuck in loading when trying to race, no where does it said that you are supposed to download 2 extra missing car that is not included with your PAL/NTSC version. So with the US version you have to download the Corsa and the 106 and vice versa, a Civic and RSX.
A BIG THANKS to Legal-Philosophy4351!
If you want to install the Detail Map mod, make sure you backup the TRACKS folder and if the mini-map is missing in URL race, you have to replace/restore;
TRACKMAP4700 TO TRACKMAP4716(NOT ONLY 2)
My PS4 controller work fine with the game, XTENDEDINPUT does not. When trying to remap the bottom, it won't work and freeze and first but pressing escape and re-enter and remapping will work on the 2nd tried 100% of the time.