The 3cars.rar file you have requested: Modifications / Drivable AIs For Haulin' - 1.66kb is not available. Perhaps try browsing all files for the game 18 Wheels of Steel Haulin and upload any files you want to share or are missing. This is the only information we could locate:
There are three files in this that need to be extracted with WinRar to your Haulin' mod folder. Pack includes a drivable Flatbed Truck, Chevrolet Blazer, and a super secret! Enjoy! This is a drivable car pack for Haulin'!