Grand Theft Auto San Andreas Question For Xbox?

I was wondering if anyone has found all the places to spray over the tags of rival gangs and the places where you have to take the pictures with your camrea and the Horseshoes or Oysters. I can not seem to find them all. And if you do find them all do you get anything like when you beat the extra missions in Vice City and you get guns and such. Is there an online place where I can find them all?