http://www31.brinkster.com/decapod/
Scroll down to 'SRE2.cdp'. Downloaded it. It should work in TS2010, beware though it won't work in the IPad or Mobile versions. (It seems obvious, but a lot of beginners who have IPad seem to think you can install .cdps on to the IPad version. You can't.)
I know how to fix this. Here's how:
1. On the TS2010 launcher screen select the 'main menu' tab.
2. Go to options.
3. Tick 'enable compatibility mode for older content'
4. Restart Trainz. It should now work.
When you say cab do you mean the outside or the interior? That E2 doesn't have an interior but I have a suspicion that the texture files may be broken, causing the cab\bunker area to go see through.