I had problems figuring out how to get my stout stuff to work too. What to make it with C02 and then what to do on nitro, etc. In the end, here is what I do. Keg it, put it straight on beer gas at about 25, and carb it that way in the fridge. I know it cost me more since it uses more beer gas to carb but my beer has been coming out great this way.