Research 8

Flash:

http://kb2.adobe.com/cps/142/tn_14201.html

http://kb2.adobe.com/cps/128/tn_12804.html

http://www.knowledgesutra.com/forums/topic/6645-exporting-transparent-images-in-photoshop-to-flash/

http://stackoverflow.com/questions/2093971/as3-how-to-get-a-movieclip-to-stop