Hey Hitman,
You might want to try a couple of things. Start training full body work-outs using alot of compound exercises and do it in a circuit format. One exercise after another... do like 3-6 different body part exercises..
Incline Press
Squat
Bent Over Row
Tricep Extension
Crunches
Plank
If you want to burn more fat and build lean muscle mass, up your reps and perform 12-15 per set for 2-3 sets of each exercise.
As or your cardio, you need to walk at a brisk enough pace that your heart rate becomes elevated.. at least 3.6 to 4.3 mph. And try doing 20 minutes two times a day. Once in the morning and once again later in the day or early evening, it just helps to maintain a steadier, elevated metabolic rate.
As far as your diet goes, try to cut out breads, pastas and cereals after 3 pm or after dinner at the latest. That includes Doritos!! That doesn't mean you can eat whatever you want before 3 pm either.. diet is probably the most important factor in weight loss, especially when trying to shed those last few stubborn pounds.
Have a look at my site. It has a full nutrition guide, all the programs you could need and alot of different exercises that you can mix into your current work-outs. You can even check out you BMI and calculate your body fat % to see where you are at.
http://www.trainwithmeonline.com/index.asp
Send me an e-mail if you have any questions about anything!
Good luck.
Ben