Game Theory 101 (#65): Solving for Bayesian Nash Equilibrium 

gametheory101.com/courses/game-theory-101/
This lecture shows how to use Nash equilibrium to find Bayesian Nash equilibrium. The trick is converting the multiple potential matrices into a single one, creating new strategies by using all combinations of strategies among the types. Once you have converted everything into a proper matrix, you can solve the game by using Nash equilibrium as you normally would.