https://forum.rigsofrods.org/account/user-token
You must hit enter to submit your token in multiplayer settings.
Multiplayer Collisions are very experimental and thus have various issues.
Fixes
- Changed stereo sounds to mono
- Added skinzip into the main zip, no longer two files to download
- Added sections to be able to select automatic or manual rear steering
I don't think a .skin file will work for what you are wanting. But using sections will. Just setup multiple soundscripts for the different sirens, and have each soundsource in a different section.
Transfercases and interaxles were only introduced in 0.4.8.0. So vehicles before that wouldn't have that option. Easy to add though.
https://docs.rigsofrods.org/vehicle-creation/fileformat-truck/#interaxles