you need a two-pronged attack: cardio and dietary control to start.
first, start walking - one hour a day. each day, try to go a little faster and a little farther than the day before. once you've got that down to a routine, start introducing weight-training until you're alternating cardio with weights six days a week.
second, monitor and plan your day's intake through
www.fitday.com - i work it all out, then write it on a checklist for easy control. eat every
three hours - split up your day's calories into five or six smaller meals (depending how long you're up during the day) - shade the carbs heavier in the morning, less in the evening. in the beginning, you'll find that sometimes you're just not hungry when you're due to eat or you're starving an hour early - stick to the schedule!
you're TII like i was (my highest weight at 5'2" was a very flabby 109kg). if you're also a carb addict, you might try carb restriction. to start, try 200 grams of protein per day, 150 grams carbs, 45 grams fat - that'll give you a
daily intake of 1800 calories per day, which is tight, but doable. note that tossed salad (lettuce, tomatoes, cucumbers, bean sprouts, alfalfa sprouts, mushrooms, onions, etc - no cheese, egg, ham, etc) is unlimited - eat that till it comes out your ears.
i'm surprised the doctor is willing to give you xenical - 200lbs isn't THAT bad unless you're 4'10".
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