I do not think this is the best idea, here's why:
Usually, a game is designed and playtested against its original rules, to fit them as well as possible.
Since the Europe version adds the train stations, the game is built in a way that encourages their use. In this case, the map has several choke points that get crowded quickly, requiring the other players to build the stations.
So as long as you respect the other rules (mainly the one stating that with less than 4 players, double routes only count as single routes), you could encounter difficulties completing your objectives.
You can just risk it and hope for the best, of course. But in my experience, dumbing the rules down is not even necessary. I've taught TTR:E to a lot of people, and even the newbs hadn't had any difficulty dealing with the additional rules. You'll have to recap the rules for ferries and tunnels once or twice, but that's it.