Editing .swf file

I just downloaded template with .swf menu

I want to edit text and change some pictures in the menu, but I want to know that should I first decompile it into .fla and then edit or should I use swf quicker to directly edit it

I mean that will I be able to change text and pictures with swf quicker, because using it is more convinient

Help

try SWF decompiler...