I am a little new to photography and I am supposed to take pictures of my friend whose husband is coming home from Iraq tonight. I want to take some candid and special photos for them to remember. I am just a little concerned on what settings to use since it will be outside at night, but there will be big lights around. Plus there will be lots of movement that I will want to capture and take quick shots of. What would be the best combination of shutter speed and aperture and should I use the flash? I will be using a Pentax ZX-7 (autofocus SLR) and 400 ISO Black and White film.