James Cameron should have known you'd make a better Sarah Connor than Linda Hamilton. Now you can prove it. The $170 Yoostar system's greenscreen and video camera let you digitally remove actors from famous scenes and put yourself in their places. If you grow bored with The Terminator, choose from clips of dozens of other films like The Godfather and Ferris Bueller's Day Off. When it's a wrap, upload your take to the Web and show everyone that you really oughta be in pictures.