The scoop is bigger then the hole in the jug and he keeps getting the powder everywhere.
Really, I'd just stick with whatever the printed directions are, but you can do whatever you'd like, I suppose.
EDIT: Why are you doing this anyway? Why not just drink a gallon of whole milk a day?
This isn't a double post...this thread got fucked by the servers, I think.
But really man, if you're just trying to gain weight, eat more. I think a pound is something like 3500 calories or so? If you're not caring whether its fat or muscle, if you just take in an extra 700 calories a day, you should put on the weight. If you're desperate, yeah, man up and drink the milk. It sucks sitting down and drinking like three or four glasses but it works.
What country are you in? In the US this diet became popular again because a gallon of milk became cheaper than the protein powder/weight gainer equivalent. Last year a gallon was dirt cheap at my grocer. I think it got as low as $1.99.