I have been asked to take some shots at an upcoming prom. My kit is a Panny GF1 with 14-45 and a Oly 50mm F1.8. I know I'm going to need flash but......................I never use one and don't want to spend a lot on one. (though I could get the flash bug!) I was thinking of a wireless trigger with a cheap second hand gun or even a dedicated cheapy E-bay gun. Any suggestions very welcome.