You say you are doing weights on Monday and Tuesday. ARe you doing the same exercises on both those nights? You need to give each muscle group at least 1 day in between to rest and rebuild.

As for a snack before areobics, I would go with 1/2 cup cottage cheese, an ounce of cheddar with a slice of lunch meat or something similar. Basically you are looking for a protein rich snack right here and not something loaded with carbs.

As for sugar alcohols....you won't know how your body treats them until you try them. But if you aren't losing any weight for several weeks, that would be the first thing to cut out. Plus with MANY people they will give you diahrea and bad gas. They taste good, but man do they have consequences for eating them!

If time isn't an issue I would split your workouts up more like this....... but if you can't get in 6 days of workouts, then stack some of your cardio on top of your weight training. Not as effective, but still better than not doing it at all.

Monday - Weight training
Tuesday - Cardio
Wednesday - Weight training
Thursday - Cardio
Friday - Weight Training
Saturday- Cardio