Sunnypalms .... No amount of ab exercises will get rid of those 2 round tires.... You need regular cardio exercise, weight training and last, but most importantly, healthy low fat eating to get rid of those tires.... Find an exercise and eatin plan that works for you...
Here are some great sites to start you off....
http://www.fitsite.com/anatomy.cfm
http://www.fitfaq.com/index.html
My favourite is :
http://www.stumptuous.com/weights_index_revision.html