Again thanks you guys, all is working now, or at least I understand better how it works (or not!!) so to recap, rfmod name file without space, rfcmp files in packages folder + AUTODOWNLOADS=TRUE in the multiplayer. json if mod required on the server and finally the ultimate issue was about the different versions of cars, no idea why it worked with the ferrari but the best solution is to manually move the updated version in installed folder like you suggested. I did quite a lot of research but didn't read about those details!
That is a Problem since the Release of rFactor in the Year 2005, no official Manual/Documentation. And that we still have to edit Files, to get some Things working as wanted, is also not the optimal Situation. So as a Newcomer to this Game, you have to search the Web and ask here in the Forum or elsewhere, like the Discord (that i don't use for Example) or you go the "Try and Error" Way, that we all do love so much. All Information is available, but spread all over the www. So it's hard to find sometimes. But i think that 98% of the Problems can be solved with the Help of the Community.
