Now move the box so that it passes through the part of the ramp that needs the snowmobile to ride through before jumping:
Go into Object mode, rotate the JumpVolume node so that the blue vector is facing forward (jump direction).
Another pic of how the box intersects with the hill thing. Snowmobile rides in from the right and accelerates to jump to the left.
Adjust the Velocity in JumpVolume. (I chose 1400)
