No, as mentioned in my initial post, the engine doesn't crash when I load it directly, or when I place it in another empty level and start that one.
As mentioned, it does not crash when I place it as a prefab, means wmP, in a level - in my case, this would be sufficient, but I can't get access to a wmp within the game via script for loading, moving, removing and such, right?

It only crashes when I place it as a wmB in another level.

I tested it in two different levels with about 100 models, added in WED, and started the levels, once with the related scripts and once without a script simply with a level_load from the main function.

The .$$m, .$$w, .wmp and .wmb are in the sent folder too, maybe, you can check that files, or you can place it in a given level of your own?