I don't know why you can't eat cooked oatmeal, but....yes, you can put rolled oats into a shake, and they actually taste pretty good. No instant oats, rolled. Steel cut won't work out to well either.
Milk, Grow! (Metabolic Drive), oatmeal, blend, drink. Yummy.
Of course if you can't stand eating cooked oats to begin with it is because you're eating instant shit oats. Fork out the extra two dollars, but the steel cut, and eat some real oats like a real man.
If you've got to "chug" your food to get it down your gullet because it tastes like ass, you're probably not eating real food.