Program to edit .swf game files?

Okay so, does anyone know of a program that will let me edit most attributes for an .swf file? Example: If i have an .swf game file, and i want to a) give myself more money/lives, b) spawn enemies when i want to, how would i do that. I am asking because my friend edited the game called Age of War 2 where certain enemies come early in the 3rd age instead for the 6th. (he made alien robots come instead of archers lol). I know you can edit the money and some other things with cheat engine, but how would i do what he did? he won't tell me.. :(