AveStyler is an in-memory uxtheme patcher that will allow you to use custom themes on Windows without replacing system files. AveStyler is the first application of this kind that supports Windows XP, Windows 2003, Windows Vista and Windows 7, all both in x86 (32bits) and x64 (64 bits) versions.
As a bonus, AveStyler comes with an application to install, delete and apply visual styles with one click of a button:
You can get AveStyler for just 3EUR (approx. 4USD) from http://www.avestyler.com .

How does AveStyler work with VistaStyleBuilder, and testing styles…
They work together – AveStyler does the uxtheme patching and VSB does the theme testing/creating.
So you can load in a Work in Progress theme from VSB into AveStyler with its in-memory theme loader and generated previews.
yep!