First in home studio

My girlfriend bought me a mini home studio...I didnt quite know what I was doing lol but here is a shot of me and my girlfriend. C&C please.

oh and the set up was two lights on each side, one aimed at the background and a 580exII on camera

Nice shot, I can't give you too much advice about studio setups but looks great. Maybe having more shadow on the face would give it more character. Maybe shift the 580 off camera?

The exposure looks good but the light is a bit flat. So are you saying that you used 4 lights? IF that is the case try using 1 on the BG, 1 straight on from the front and 1 from 45 deg. from in front of and slightly above the subjects. This is a basic 45 deg lighting setup and will give you modeling light. For starters set the BG light to F11....set the fill light (straight on) to F 4.5 and set the key light (45 deg) to F 8. If you can use a shoot thru umbrella or softbox on the Key and Fill lights you will get nice soft lighting. You can use your 4th light as an additional BG light or add a snoot or some other type of limiting modifier and use it as a hairlight. I use this type of setup (way too much!!) and get some very nice modeling shots with it. Keep on shooting and playing with the setup and you will be amazed with your results!

You'll need to move farther away from your background, also, to give seperation from the subjects and the bbacground. About six feet in front is usually a good distance. I can tell you this because I made the same mistake when I first started using backgrounds.