Hey all, So I have been asked to do something I hate, two things actually. Take pictures of people, and take them at night. All I have (unless my stepdad lets me borrow one of his flashes) is the flash built onto the D90. We're taking pictures at the SLC temple because they have amazing christmas lights; so how do I take pictures of these guys without drowning out the lights with the flash I have? Now, If I can get a different flash, what is the best way to do this? OR. I do have a tripod, should I do a long exposure and use the flash while they're in the frame?