Visible part problem

Here is my isue. I made this site in wich I load .swfs through XML . Everything works no problem there …but the .swfs that I load show more then just what should be on the screen …like if I have a hand that comes from outside the flash area …it should only be visible on that areea…hope you got my point. It’s like when you preview a .swf movie in a Html. Anyway I made script masks to mask only the areea that I want visible but that takes alot of time and onestly I think there must be a much easyer way …do you know anything about that?

                     ©KatSOft