...don't bother...

Can you name the missing assets in Trainz you wish to add to your game?
Check out the locomotive add-ons at
AlabamaRailfan.com
The author of these & owner of the website told me as a friend that I would be better off starting from scratch...
I have msts, would not give it to my worst enemy...
I downloaded his locos & yes you can change cabs & enginesounds but the terrain...etc.
I'll give MSTS2 it's due...after I've made sure I spend all the money I wish at the Auran Shop!
But anyway, what your missing may or will eventually show up in the Auran Trains Simulator...
You are not the only one to ask this question, so your not the only one to want what you wish to have!
Some of the msts content is just a few polygons(boxes) put together & a lot of three dimensional tricks with textures...so what...
There is a dedicated group of designers being paid by Microsoft to complete the design of the next msts.
Auran has a website where practically anyone including whining flamers may participate & many beta's offered for download to potential Content Creators.
Their efforts will be realized soon.
The two major Global locomotive builders? We so have the best enginesound going for both!
Spend your time on a worthwhile endeavor...like upgrading your computer!
Get ready for the "WOW!"