I was getting pretty confused about it, too, at first, because it's completely different than what I was used to as being what's "good for you" as opposed to what's"bad for you". I still have a problem getting it through my head sometimes that ice cream can be good for me and a sandwich can send me over the edge!

The best help I got was picking up a copy of "The Glucose Revolution" at a used book store. It breaks down not only the foods and what their ratings are, but WHY their ratings are what they are and what it means and how the index affects your body and the various chemicals and such. I'm one that has a "need to know", so explaining everything in minute detail is right up my alley
As far as homeopathics go, right now I am mostly trying Vemma, which is a vitamin and mineral supplement that is all-natural and liquid, so you get all the benefits. It's got alot of the same ingredients that the insulite information talks about, but I also take supplements of B vitamins and increase my intake of potassium and Vitamin E in my diet, just to be extra covered.
If you would like, I can put together a packet of copies and such for you of the explainations and the GI chart that I have and mail them to you. (I would suggest sending your addy in a private message, though, if you're ok with that). That would save you the expense of buying the book before you are sure you want it.
From what the doctor told me, weight training is the absolute best exercise you can do to bring up the insulin receptors on your cells, also to lose weight, so I focus alot on that and stair stepping so that I can indulge in my favorite form of exercise more regularly and for longer intervals (hiking!)
If there's anything I missed or any questions you have, feel free to ask. I did alot of research and I love to share to my discoveries!