Well, I've got the same problem as this guy :
http://answers.yahoo.com/question/in...4165525AA1mQso
I can't apply any other theme except Royale or Zune. A program named " Uxtheme Multi-patcher " could help me to solve the problem.. BUT.. I'm afraid that this program may affect my PC badly, such as, after installation it's asking me to reboot my PC and I click " Yes, I want." and after the reboot my PC just freezes. Can I use this program to patch my visual styles or may it affect my PC ?

My PC Specs. :

System :
Microsoft Windows XP Professional Version 2002 Service Pack 3
Computer :
AMD Sempron(tm) 2200+

Thanks in advance.