That had happened to me, and I'll try to help you. To start, download the snow mod you
mentioned for Euro Truck Simulator 2 in TruckerMP mode. First, download the mod from
this link: Frosty Winter Weather Mod
If you don't see the "mod" folder in the following locations, create it yourself. For
example:
C:\Users\scara\Documents\ETS2MP\mod
C:\Users\scara\Documents\Euro Truck Simulator 2\mod
Once created, place the downloaded mod file inside the "mod" folder. Afterward, be aware
that one of the mod files affects physics, making snow influence driving. So, be careful to
avoid accidents and not ruin the experience for other players. In the Euro Truck
Simulator 2 mod manager, activate the files you downloaded. Make sure they are on the
right side of the list and highlighted in green.
Now you can enjoy this multiplayer simulator. If you have any doubts, I'm here to help. I'll
also provide you with the links to the snow mods for ETS2 and ATS:
ETS2 Snow Mod: Frosty Winter Weather Mod
ATS Snow Mod: Frosty Winter Weather Mod