The DefilerPak is a minimalist collection of video and audio codecs designed to keep you up to date with the latest developments.
Not much to be said here. If there's something you don't want, you're not forced to install it.
The default options are recommended.
Check out the Audio Configuration icon if you need a specific speaker configuration not covered by the installer.
By all accounts, DefilerPak works on all versions of Windows.
Personally, I have only tested it on 98, 2000, XP, and Server 2003.
If you use something else, I may not be able to help you.
The latest version can always be obtained at:
http://hellninjacommando.com/defilerpak/
If you enable any of the newer features of ffdshow, God knows what will happen. Fear walks among us, clothed in DirectShow.
H.264 playback is still not perfect with ffdshow. If this is important to you, I recommend buying a copy of Nero.
Any other bugs you encounter are special "easter eggs" included for my loyal fans.