Loading levels from a simple tutorial start

I just finished the MinApp tutorials (excellent stuff... pity he didn't seem to finish the series), and now I want to expand on them. The obvious direction is loading a level so I can actually have a game. But I'm pretty stumped as to how to go about doing this. I've looked at tutorial.base and starter.fps to see how they load levels, and searched the forums a little, but the solutions discussed didn't work for me.
So, working from the end of MinApp 4, how can I load a mission?