some diets for a a lactose intolerant vegetarian?

I'm lactose intolerant too.
You can take loads of soy products like soya milk, taufu, beans stuffs. To keep weight off, you can take grain/wheat/brown bread instead of white bread. Brown rice, rice etc.
Stay off cheese & chocolates (reduce chocolate intakes & sugar). U can take honey & stay off carbonated drinks. These have loads of sugar.
U must exercise as well, diet itself won't keep the weight off.
A normal 30mins. run/walk would do daily or even housework will burn the carbs.