You should see good results from low intesity cardiovascular work 4-5 days per week @ 45 minutes per day, keeping the heart rate in between 109 and 128. if at all possible do cardio in the morning to get that Metabolism jump started, then lift weights later in the day to allow sufficient energy system recovery for a strong workout. This is somthing i do with all of my clients, and especially my athletes. remember, the goal here is to burn calories in excess of your bodies nutrient supply, forcing the body to metabolise fat as its energy source. Also keep in ind the importance of solid nutrition, low gylcemic carbs, plenty of water, and EFA's. let me know if you need anything else!
-J_Merk