I haven't installed it, but from looking at the package, there is 2 potential problems...
There is no consist file included, no problem, you can make your own in the activity editor.
Next problem is the cabview, it's pointing to a nondefault train, so in order to get a cabview, you'll either have to download the cabview or alias it to another (default cabview)
I haven't used trainsim for a long time, so I'm hesitant to give step by step instructions, but if I can find a link to a tutorial, I'll post it.