Need a program to edit action script in a .swf file

[Ren]

Hi. I think that's a real newbie-question. Should be no problem for you to answer. :-))

I want to edit the action script in a .swf file. is there any share- or freeware program that is able to do that?

[Strok]

So far as i know there's just only one on the market:
URL Action Editor
http://buraks.com/uae/
and it allows you to edit just a URL

[Ren]

is there a way to get that proggie for free?