Very good work! Besides the desert freight and Canadian mountains route, are there any other routes for a locomotive like this?
Quite a few actually. If you head over to the bve wiki website, you can search for not only this locomotive so you can download it and mod it yourself, but you can also browse through their hundreds of routes. There are at least several dozen commuter style European based routes (or Japanese) that are either electric or diesel and can be used to run these trains. For example, I nearly always use the Sellye-Pecs and Kiralyliget routes to run my personal commuter stock. There is also the MAV120a that I have found very pleasant to operate, and have taken the original route, and created different run scenarios for. You may also like the Solyomvar route, which is related to the Kiralyliget route (and electrified). These are all the main routes I run with my equipment.
Oh, I missed one. Hard to find, but the Edinburgh - Aberdeen line is a nice long 2 hour diesel passenger run that you could use for this as well. Takes a lot of patience to run that one, imo, especially if you want to be extremely realistic and follow the speed limit signs to the marker.
EDIT: How could I omit this one? If you can find both of the websites, the Holland based routes are VERY long and VERY fun to run. They are all electrified, but you can obviously operate diesel stock on them if you wish to. There are, I believe, a dozen or so routes in total, and all together, they'll give you about.... AT LEAST 24 hours of non stop game play.
