Installation:
To use custom visual styles you need to patch your system, via
VistaGlazz or
TuneUp Utilities
Next unpack 'NEXTLevel' folder to 'C:\Windows\Resources\Themes' (where C is the partition with Windows installed)
Now you can change the visual style by clicking any .msstyle file, or
via 'Control Panel\Appearance and
Personalization\Personalization\Window Color and Appearance'