Microsoft used an illegal version of Sonic Foundry Soundforge 4.5 to edit wave files located in the Windows\Help\Tours\WindowsMediaPlayer\Audio\Wav folder. When you open the files in notepad you see the name "Deepz0ne" at the end of the files. Deepz0ne is a member of Radium who cracked the audio editor.
Don't know the source or validity on this one but open up one of the files and check for yourself.
News Story:
http://www.tomshardware.com/hardnews/20 ... 35458.html
What I found when I looked:
LISTB INFOICRD 2000-04-06 IENG Deepz0ne ISFT Sound Forge 4.5