How do I load custom levels/content via wads? When I click on the main wad, it just starts the game, with no option to load other levels.

It's almost perfect! The problem I have it that it locks up kinda. I move forward and then when I drop the d-pad my character continues to go forward. That's what I mean with the locks up. If it was fixed I would play Doom on my Pandora all the time! :D