Well in my rpg maker 2003 I can use Avis and mpegs so I dont see why not.

As to your other question bluecube is the best at explaining those kinds of things.

If what you mean for score is that say you defeat a certain guy you get 10 points.Rescue the princess you get 50,that is easy.Just create a variable that holds the value of your score meter,then every time you want to add to it just put a Add to variable command to your event.


Now for the unlocking part that would require something like a new game plus I think.For a tutorial on that go to the gaming world site.