This what I use, have never had a problem. IMO litestep, windowblinds ='s bloat, but just an opinion.
http://www.neowin.net/forum/index.php?showtopic=308905
(taken from neowin post)
This program will patch your uxtheme.dll file so you can use any 3rd party visual style on Windows XP/SP1/SP2 and Windows Server 2003/SP1. File protection dialogs should be cancelled and a reboot is required after using this patch.