Hi Ralph (hope you don't mind me intruding on your forum!)
I too was worried about loose skin as I am losing weight so quickly. I took some advice from a couple of friends, who are fittest trainers (One owns a gym)
I think Lighter Life is similar to LT. I was told to not do any cardio as I was not consuming enough calories, and there was a chance I could go into starvation mode, making my weight loss slow way down. I am also very active during my day, so cardio on top of normal day activities is too much.
I was told that brisk walking is great. Light free weights and static weights are excellent. Squats, big ball work on your abs, and balance/core exercises. I am also using a vibro plate, on which I do a series of exercises. I have now lost just over 6 stone and my skin is great. I'm not kidding myself though, I've a hell of a lot more to loss, so I'm bound to have some!
I've been told it can take up to 18 months for the skin to shrink back. I also use lots of moisturiser and bio oil, so it may also be helping. I use Palmers cocoa butter, St Ives toning cream, Palmers Virgin olive oil.