Error handling

If an obj file is not found, Poser should search for it, or prompt user to find it, Poser freaks out when this happens.
If a texture is not found, Poser should stop doing whatever it does after I tell it to stop looking, and just load the damn thing without textures.
If I substitute a texture because I don't have it, substitute it for all instances, or prompt me if that's ok.
If an object file has a space in a material name, just use it correctly anyway.
Just one level of undo please! If I use a pose from the library and it completely screws up my project I need a way to undo it.

Of course these are all thing we should have had for Poser 3