Now, if you're lazy and are impatient, you can always get the talent to convert a MSTS model into Trainz. I don't know how, but my friends do. It's for the best, both legally and logically, that you do NOT distribute the asset unless you get perms from the original asset creator. If you want to be extra safe, ask them beforehand if you can convert. Besides, from what I know, there's a NJT ALP45-DP for MSTS/OR (as well as an ACS-64) that are payware. I'd really recommend waiting for someone to create a custom model specifically for Trainz.