Put satsute.exe in C:\Program Files (x86)\Steam\steamapps\common\My Summer Car\
then run satsute.exe
IMPORTANT DELETE MESHSAVE FROM
C:\Users\USERNAME\AppData\LocalLow\Amistech\My Summer Car\
I already know you have to squeeze through the door and i know about the texture issues and so on.
HUGE THANKS TO AJANHALLINTA AND MARTYTHEGAMER
Satsute (Satsuma Ute) v1.3
I turned the satsuma into a ute and the collisions work properly.