I have just updated my Windows 7 Wallpapers and Windows 7 Themes Gallery with the following additions:
Windows 7 Box Art Themes for Ultimate, Professional and Home Premium editions
Windows 7 Box Art Wallpapers for Ultimate, Professional and Home Premium editions
Installation Instructions: Double click the downloaded .themepack file to install it. These themes will only work on Windows 7.
For more, visit the entire Windows 7 Wallpapers & Windows 7 Themes Gallery.
The original wallpapers were found via: BeingManan.com.
Download Windows 7 Box Art Themes
Download Windows 7 Box Art Wallpapers