I have the PS1 version of this loco, too. I have blackened the drivers, but have yet to upgrade it to ERR. I am sort of torn, as I have no particular affinity for the CNW, but the loco is gorgeous and it's a 4-6-4. 4-6-4's are hard to not want. It's too pretty - exquisite, even - to fiddle with the paint and decoration (or to sell), so what do I do with a CNW loco? Heck, I even have a set of passenger cars that match; I ran across a fantastic price on the package years ago. Sigh - it's a burden.
Did you know that the C&NW was a subsidiary of the Southern Railway?
Joke - kind of. The "Carolina & Northwestern", abbreviated "C&NW". I believe that it owned only one Southern-scheme diesel locomotive (a GP-something) and had small "C&NW" lettering on the cab side near the engine number. One has been offered in 3RO - Weaver, I think.