разгледай тук може да намериш нещо.
http://www.datacentury.net/?go=articles&a=show&id=23
http://forums.softvisia.com/index.php?showtopic=8
http://www.itninews.com/news_cats.php?cat_id=41
http://www.kaldata.com/modules.php?modid=1&action=show&id=903
http://forums.megalan.bg/index.php?showtopic=18590
