Here's for my MTH vista dome car
My MTH roof is a tad different...let's hope the rest is the same!
-Start out with the 2 end chassis screws undernieth
-remove the roof by gentlely prying between the body and the roof in the middle- the ends should be loose now via the removed screws. I used a thin standard jewelers screwdrive tip...not a phillips version.
-pop the roof off and you now have access to the dome screws
-remove those 4 and viola!
...your trains/results may vary...hopefully not.
edit -BTW, if you happen to break your car while doing this...I am in need of one railking truck for my double door bagage car...let's hope it doesn't come down to that...but if it does!!!!!!!.........[lol]