I do it every year! Let them get ripe, fully ripe, overripe even. Then crush, ferment on skins (you will have to add sugar to get to 1.090, dissolved in water) using 5-7 pounds per gallon. It's easier if you put the grapes in a HUGE laundry bag/muslin bag. If it's a large batch, use several separate bags.
After 5-7 days, press the grapes by squeezing all of the juice out, and move to secondary.
You will have to consider adding some tannin, and adjusting some of the acid out (cold stabilization is great for this), but you will get a drinkable wine out of this!