Mr.Jingles
Master of Disaster
... so while the realism is NICE, i have to say derailments completely suck.
It's ok, not everybody likes realism in a simulator, so that's why I was suggesting earlier that there should be a checkmark in the settings to turn these bounding box collisions and other improvements on or off for those who like it or don't like it.
The keyword here is : Choice

To clear up the mess after derailments within trainz you can use the Re-Rail Portal or Re-Rail Portal Basic, which are on the DLS.
Tata
Mr.Jingles