Flash Camouflage
Flash Camo (for short) is a graphics framework that allows AS 3 applications to be easily skinned from pngs, jpgs, or gifs. The framework is broken down into 3 core areas: Decals, the CSS Parser, and the CamoDisplay. These systems can be used individually or combined to fit your needs. When used together they form a powerful set of tools to help skin and style any Flash application. With Camo’s modular approach, you can use as little or as much of the framework as you want. The entire framework is under 35k.
Flash Camo is open source (under the MIT License), is compatible with FlashPlayer 9/10, Flex 3, and AIR. It can be built with the open source Flex SKD compiler or used in Flash CS 3/4 as a swc.

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thanks! ;)
Flash Camo has been updated to version 2.1. Here is a copy of the change log along with the new files to download. Don’t forget, the best way to stay up to date with changes is to download the trunk from svn. For your own safety it is probably best to build off of a tag instead, here is the location of the Camo 2.1 tag.
Hehe! Cool! It reminds me Metal Gear Solid series!
A new Flash Camo 2.2.1 Beta release is available along with the following introduction tutorial here.