Is your son still in the honeymoon phase of his diabetes? That means his pancreas is still producing some insulin. You'll want to preserve that as long as possible! As soon as you start introducing insulin into his body the pancreas WILL STOP PRODUCING ANYTHING! My Hubby says if he had to do it all over again he would cut his carbs drastically so that his body could keep up with small amount of insulin he was producing. Think the primal diet.
As Think of Winter has stated, this is dangerous advice. Whether you meant to or not, Lazurii, you are certainly implying that the OP shouldn't be starting insulin.
Sara, listen to your doctors who have experience with diabetes, not some people on the internet. The long term damage done by diabetes (read: high blood sugar) is extensive. The tighter control a diabetic keeps over their blood glucose, the better the long term picture is. This is not something to mess around with with unproven methods. Insulin works. It will keep your son alive and healthy.