Which is why I think the RFL diet is far better for someone like that; it actually enforces good eating habits right when the diet starts, rather than having someone with poor nutrition education go on a liquid go right back to how they did things before.
The V-Diet isn't bad, and it might work.
However, neither of these approaches are necessary. If someone that weight just changed their food choices, they'd probably drop weight just from that in the beginning.
Also, the guy has to really want it. My brother just dropped 40 pounds from the RFL diet, starting weight training during that, and now with a lifestyle diet with training (Starting Strength). But he was VERY sick and tired of being overweight, and this is what drove him.