Go to one of the BBQ forums. This type of burner is quite common there.
As I said, I use the oven two ways, I light the wood with the propane burner, but can usually turn it off later. Alternatively, I have cooked things, pizza, steaks, chicken, and potatoes (red, cut in half, olive oil, salt, and pepper) with just the propane burner.
I am still learning how to cook with this oven, but what I do like in general, is cooking at a much higher temperature than I can indoors....the chicken is moister, and I can brown things better.
My favorite trick, throw chicken backs, neck, giblets into a steel frying pan with garlic, onions and carrots.....brown severly, and then toss in stockpot inside the house. I have never had stock so good.