6 lbs is great! Think of it this way, you could have not followed any plan and been 6 llbs heavier. The days are gonna pass whether you are dieting or not, so if the day passes, might as well be 1 lbs lighter!
Today I'm starting the 4th stage-I don't have the book on my right now, but I think its the Smooth Module. I know how you feel with thinking that this one may slow down your weight loss! For me, I'm probably going to modify the foods a bit. For example, today it says to eat 2 pieces of pizza. I'm actually going to eat a Lean Cuisine pizza. Its still delicious but yet as much fat and cals as regular pizza. Plus, I'm not gonna order a whole pie for 2 slices :-p
There are some other low fat choices you can make to take the place of the foods on this weeks list that seem a little indulgent. Like I mentioned, I cheat on the weekends, so I try to really strict during the week when its a lot easier for me. So I really don't need to eat a burger and fries when I would have that on sat if I wanted to lol Instead, I'd rather have a veggie burger with maybe some sauted red onion and portabella mushroom on top with a nice salad.
There's also a day that says to eat chili. Sometimes (even during phase 1) I'll just mix rice, red kidney beans, and a little bit of hot sauce (hardly any cals and no fat) with that packaged chilli powder. Tastes like chili to me! And the spicy makes it very filling! I try to add chili powder or hot sauce to a lot of things because of the filling factor.
I hope some of my little tips helped! Like I said, I add my own little twists to this to make it livable for me