Use ThemePark to create or modify the way Mac OS X looks, as well as to change the appearance of individual applications.
With ThemePark, you can:
Safely apply themes created by other ThemePark users;
Edit the ArtFile, SArtFile and Extras files that underlie the appearance of Mac OS X;
Easily merge multiple themes together to mix and match appearances;
Integrate with Adobe Photoshop™ and Illustrator™ for easy editing;
Convert between the Snow Leopard and the Leopard versions of SArtFile;
Edit many theme images at once for easy modification.