I recently purchased an SB 900, I already have an SB 800, and my camera is a Nikon D80. I've done some research on the internet but I'm hoping to clarify a few points. Is it true your camera will always emit light with the built-in flash, acting as your commander? If so, how do I make it stop? Does it not hamper your creative ability to move the other lights around and starts to just make flat lighting? Is there a way to make the SB 900 the true Master and have your camera NOT emit a flash? OR Is there a way to have a pre-flash off the camera to act as trigger? Insight is much appreciated. Thank you.