There is a problem with the Big Boy Sherman Hill Scenario Part 1. Two AI trains collide with each other, UP4774 and two helper locos parked at Hermosa Rock Track. I fixed the problem in the normal scenario by deleting the two locos. But its really annoying that you can't fix the career scenarios the same way. I tried in RW tools and succeeded only in breaking it completely now it won't load. Its a pity because the Sherman Hill / Big Boy / Challenger pack is one of the better efforts recently.
Geoff