This may seem like a stupid question... I am starting my color photography class (well, I started it already, but we're starting color in a few more weeks) and our teacher told us that we can use "any color film that can be processed in C41 chemicals." What kinds of films are those?! Can I go to Wal-Mart and get the Kodak or Fuji whatevers and be able to use them? Thanks for any insight.