Is it possible for you to define five or so different start up screens (where as the one we have now is the default one) that we can tell the engine with scripting which one we want to use.
This doesn't allow non pro users to make their own start up screens or edit them in any way, but allows us to choose from a list of different ones.
Can your bosses at least agree to this?
Is still think the start up-Window-Contest is a good idea, maybe you could make it so the top 5 make it in.