Custom Consist

You can do something consist creator, You can mix trains up the coaches (such as: GWR Coaches, TGV Coaches, Freight coaches, BR Coaches) but can not mixing up electric multiple unit with diesel multiple unit so it does go hybrid, but it can couple it (if they have same couple type, example as Class 314 and 465 have the same couple system, it might as well couple it correctly). You can make like 2 GWR HST without GWR Coaches (its simple)

 

Or just like train sim, just pick an engine and cars before starting a run.

 

I would love this , I cannot stress to you how much I want to haul dostos with the AC4400CW