the error you got is likely due to the options you have set for winzip. As Ive never seen this error before, I'm at a loss on what settings would need changed in winzip. Maybe a simple upgrade to the latest version would stop such errors. I never tried making birdy (or the technique) hat. I did mess with making a fur coat using the technique, but I gave up after a bit out of frustration in losing uvmapping in my modeller. :) BT