This isnt the first time I was shooting my sisters volleyball game in a gym. The first time I didnt have a flash and was forced to shoot at 1600iso with about a 1/60 shutter. That didnt go over too well. Now, I have an SB-600 on my D40, along with a 55-200 f4-5.6. I got my adjustments to a somewhat acceptable range. I was shooting at 800iso, and about a 1/250 shutter at about f7.1 ish. I got some mildly acceptable photos, but the flash seems to be making huge shadows all over the place. I cant bounce it off the celling, or a wall. I was thinking use an index card to diffuse it a bit. I was contemplating using a different lens like my nifty fifty, and sitting closer, or my tamron 90mm, but then I would run into DOF issues. I want to be able to capture the colors of the gym, and be able to get good action shots. I dont really know what to do about this?