Unverferth Roadrunner Header Trailer v1.2

Unverferth Roadrunner Header Trailer v1.2 Nothing too special just a few upgrades from the original
Credits do go out to the original creator Casearias Modding
1) Replaced the dirt texture giving it a more shinney look
2) Changed the wheels to a more fitting set
3) swapped out the dolly pivot for a new one with fenders.
4) fixed the lights
5) fixed the collision issue in the rear
All in all, just cleaned up