For A List Of Various Themes/Skins/Window Blinds, Check On Here:
http://www.wincustomize.com

For AlienWare Desktop Themes:
http://www.alienware.com

For MicroSoft Zune:
http://www.zune.net

For MicroSoft Royale Remixed Desktop Theme:
Search It In Google And Choose The SoftPedia one...

*Edit:
You Can Also Try Vista Transformation Pack Version 7.0.1 (Coming Soon!) By Windows X's Shrine And/Or Try Vista Inspirat 2 By CrystalXP.net