To answer your questions:

A: My game isn't crashing with any of his workshop creations, so the issue is most likely on your end. My guess is that you need a better CPU (Central Processing Unit) and GPU (Graphics Processing Unit, or Graphics Card). Make sure you update Spintires to the latest available version too.

B: This has to do with the way vehicle are created for Spintires. A random string of Alpha-numeric Characters is given to the vehicles and it is up to the creator whether or not they want to give the vehicle(s) a proper title. Given the amount of time it would take to rename every single part, a lot of creators choose not to rename their vehicle(s).

If you have any further questions, I strongly recommend you ask them on the Oovee.co.uk Forum, because your questions, issues, etc. are much more likely to be answered there.