Hello, I am having trouble taking good photos and would like to make sure they come out on a shoot I have tomorrow night. I am using a Canon D20 and would like to use the advanced settings AV, TV, P, M, etc... I will shooting from about 3 to 7/8 pm with the sun at my back glaring on the objects I will be shooting. It will be men running, a few slow moving helicopters and some race cars in some cases that may be moving rather fast. I will be using the white EF L lens 70-200mm series. What would be the best advanced setting to use? And from there what should I set the settings at ? Id also like to get an idea of the ISO setting I should use. I figured I would start at 800 and work my way up the later it gets in the day. I am really lost on this one and would appreciate any tips or comments you may have. Thanks a lot for reading, I appreciate it very much.