Demi,
I think the advice is to go from Hi GI foods on Friday and move to lower GI foods by Saturday night. Also, that you are going to be incorporating resistance training into your overall plan. Also there are specific calorie grams for carbs, protein, and fat depending on your lean body mass. So saying you can eat any amount and not put on fat is not completely true. I suggest that you read L. McDonald article throughly before starting CKD. Here's the link.

Carbing Up on Cyclical Ketogenic Diet - L. McDonald

As far as supplementing stacks, I suggest investing in Trainerdans Metabolism book. He gives a complete strategy.

Regards,
Lux