I've been using a cross trainer for a year now and haven't lost any weight at all (but I do cheat and snack).
I suspect the only way you will really lose weight is to diet as well as exercise. If dieting is difficult, try eating heathily but eat smaller portions on a smaller plate. To lose inches around your stomach I suggest you buy yourself a good book of floor exercises, such as push ups, stomach crunches, etc and do them religiously every day although it will probably take several months before you notice much difference.. 15 minutes on a cross trainer will burn about 100 calories and probably just increase your weight by giving your stronger leg muscles which will weigh more !