BYFEE, I have also made a couple of other transport mods if the train doesn't suit you:
http://www.taleoftwowastelands.com/content/rel-alpha-ttw-vertibird-transport-v3
http://www.taleoftwowastelands.com/content/rel-alpha-bigmt-transportalponder-upgrade
The problem that will always affect projects like TTW is how to manage the timeline issues. Even without my transport mods, the first time you travel on the train in TTW, 9 years go by. But if you take the train back to DC, everything is the same as it was when you left.
So unless time travel is involved (which to my knowledge has never been implemented in the Fallout universe) you just have to assume that things are kind of in a holding pattern unless the courier/lone wanderer gets involved and shakes things up. To me, this is pretty easy to accept, since as we know, war... war never changes.
I remember because we would get a unique weapon from it.