Pere Marquette 1225 was the engine that was used for the famous 2004 movie, Polar Express. and I've wanted Pere Marquette no. 1225 or a Polar Express Route with Pere Marquette 1225 to be added to this game ever since I got this game in 2011.
There's a PM 1225 model available on Railworks America. It's part of the RW&A route, howver, you can download just the locomotive if you want. http://railworksamerica.com/index.php/home/donationware/item/226-rwa-lakeside-route
It would also be nice to smokebox make this, 'cause the Berkshires have had really bad textures for the cab