Watch Brewmasters on Netflix. The guys at dogfishhead do one in an episode. They actually chew it to get the enzymes going, but they spoke to one lady who makes it regionally (I think they're in Mexico?) and she says modern (modified) corn already has the enzymes. Though if you're planning to use an ancient corn, you might have to go to work or maybe mash it with some barley to convert the sugars. I have no idea how youre thinking about doing it, but this is everything ive heard about it. Good luck!