There are hell lot of themes available these days in the form of custom mssstyles which lets you change the look and feel of windows xp easily.
But, the main hindrance for applying custom mss styles on windows xp is due to uxtheme.dll which is a Microsoft system file in windows xp which blocks from using any custom mss styles.
So, before you can apply any mss styles you need to patch Microsoft system file, you can easily patch uxtheme.dll file with a small freeware program called UXTheme MultiPatcher
Let’s see how to use UXTheme MultiPatcher
Uxtheme Multi-patcher allow you to use any 3rd party msstyle theme on Windows XP with SP1/SP2 or Windows Server 2003 just by patching the uxtheme.dll (dynamic link library).
This small software will patch your existing uxtheme.dll with a single click of a button, you just need to download the uxpatcher.zip file and extract the executable file UXTheme Multi-Patcher 6.0.exe
Launch UXTheme Multi-Patcher 6.0.exe press the patch button to patch existing original uxtheme.dll by Microsoft.