she is called Katerina here:
http://www.bigboobsalert.com/index.php?page=viewnews&news_id=5463&title=Katerina%20Obession
http://www.bigboobsalert.com/index.php?page=viewnews&news_id=5442&title=Never%20Enough%20of%20Katerina
http://www.bigboobsalert.com/index.php?page=viewnews&news_id=5406&title=Wow%20Katerina%20Hardcore
and Katrin Kozy at:
http://www.busty-legends.com/model/77/katrin-kozy.html
I think this is her thread:
http://peachyforum.com/forums/t/116415.aspx?PageIndex=1