I disagree, Style XP from TGT soft is a WAAY better theme manager. It has built in function such as allowing you to change your start screen, loading screen, wallpaper, themes, etc.
Doesn't hog alot of resources, and therefore themes are alot better than windowblinds IMO.
Sure windowblinds has awsome themes, but can you say resource hogger?
http://www.themexp.org/
Note: visual styles and themes are the same