Even if you do't own an Ironmaster Super Bench, this a good video showing just some of the thousands of exercises that can be performed with a bench and some dumbbells. However after you see some of the cool attachments and how easy the bench is to use you will probably want to upgrade.
My favourite exercise in these videos is the one legged squat. Who said you ca't train legs hard with just dumbbells and a bench. If you think this exercise looks easy then give it a go.