Well, the interval training will certainly help, but the biggest thing you could do is drop those carbs! You probably don't need to lower them as far as the Atkins diet would have you do, just drop most starchy foods and replace them with fruits and vegetables. Try to raise your intake of good fats also, such as flaxseed oil, olive oil, fish oil, (or just eat lots of fish). Since you're lifting, try to raise your protein intake also.
Your percentages would be more like this-
protein--40%
carbs--30%
fat--30%
This is what works best for me. I could never lose weight on a high carb, low calorie diet. Only after dropping carbs was I able to consistantly lose bodyfat.
Good luck!
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