Basically all i do to scan plastics is put them into my scanner go to a Photo program and select Aquire image from scanner usually in the file menu.  Set the DPI to 300 - 600  and scan it in then when i print it out its exactly the right size.  The ones im after are the two big ones up near the ball arch and the left slingshot one.  There is one broken one but i cant remember which one.