Index doorway trick (or some magic :)

[DJilla]

Originally Posted by neveremail

I've found that with each mirror in its own complete directory and changing the text completely on all pages in each page of the freesite (meta tags, title, content on pages, the lot) that I still got hit hard for duplicate content..

IMHO this isn't possible. If your really doing what you describe above then you no longer have duplicate pages... bottom line. Spiders only see what you give them they aren't psychic.