Well I would train your abs twice a week.
Do this:
Workout 1:
Crunches on a flat bench with your upper back
hanging slightly off, this gives you a little more stretch than the standard crunch. Do 4 sets of 20-25 reps. Go very slow with the reps. If you can get more than 20-25 than your not doing them strictly enough. Go slow and make sure you feel the movement. This is not about how many reps you can get here, its about purposely fatiquing the muscle. Hell if you can only get 15, thats even better. Go slow and squeeze your abs.
Leg raises or knee raises on a chinup/ab station. After your assault on your abs with those crunches, you'll be lucky to get 15 here. Remember don't swing your legs up, slowly lift them up. 4 sets, 15-20 reps.
Machine crunches. Choose a
weight that causes you to fail around 15-20 reps. 3 sets.
Workout 2:
Rope crunches, you can perform these over on the cable crossover station. 4 sets, 20-25 reps
Machine leg raises, 4 sets, 20-25 reps
Broomstick twists for the obliques, 4 sets of 100. On these remember not to turn your head. Your head should face forward the whole entire time, only your torso should twist.
That routine will help you build and define your abs. But, whats going to happen is, the abs are going to grow underneath and just push the fat out further. The fat is not going to leave. You will have an awesome set of abs under that adipose tissue. Your diet should look something like this:
Breakfast:
6 egg whites, 2 yolks
1/2 cup of oatmeal, plain
coffee, multi vitamin
Lunch:
grilled chicken breast, can of tuna, lean hamburger, grilled fish, lean cold cuts, choose one of those
cup of brown rice, or medium sweet potato, wheat bread, or oatmeal again
Before you workout:
have a protein shake, 1/2 cup of oatmeal, and a granny smith apple
After training or dinner:
A meal similar to lunch
late night snack: choose any of these:
Jerky
rice cakes with natural peanut butter
protein shake
boiled eggs
cold cuts
nothing sugary or loaded with to many carbs.
Drink at least a gallon of water a day. You would be suprised how much this helps with the fat burning process. Plus it cleans you out to.