Crossposting
http://answers.yahoo.com/question/index?qid=20101016190530AAzciZL
http://150.70.95.34/viewtopic.php?f=4&t=43
http://www.rabroad.com/forum/php/cut-image-many-segments-php-1055783.html
http://www.forumlogr.com/thread/iwDbGvidTkw0/Cut-an-image-to-many-segments-in-PHP.html