super simple to get, follow these settings:
Create a custom rally from the main menu
Finland
stages 1
Ai - easy
Damage - severe
map - Lassila (afternoon or morning)
Car - Class A - Fujin
start the race, smash into lots of things until you car is on fire and then continue to the finish line to get the achievement, you can also get the "barely keeping it together achievement" at the same time, by spending a few more minutes after your cars on fire crashing into things before you cross the finish line.
** crashing with this car at over 100kpm will result in you failing the race.
heres a video guide -