I agree with what's been posted above...that's why the last two structures I've built were scratchbuilt to fit the particulars of the small Ontario town that I'm modelling. Everything I seemed to look at for "downtown" buildings were 2-story structures, when out of the 25+ buildings in my...
"what looks different on this unit, from a "normal" SD40-2?"
I'd say that for Canadian modellers, the CP version is the normal version of a SD40-2. I believe that most of the features noted above would be typical for this class. That's why these engines even have their own web page...