This is a GNOME Shell theme based on the NeoGeniX XP theme by dobee.
NeoGeniX by dobee (thanks for the permission to port this theme).
iDrops wallpaper by nyolc8
NeoGeniX Icons Suite by kali2005
Backup your theme directory first. Extract the zip file and rename "gnome-shell" directory to "theme" and copy to /usr/share/gnome-shell/. This path is usually where GNOME Shell is installed.
Restart GNOME Shell by Alt, F2, then type r and press enter.
You can use the gnome-shell theme extension for easier installation of themes.
This theme is compatible with GNOME Shell 3.0.
This theme supports the gnome-tweak-tool/extension for easy theme switching. Just download the zip, load up the GNOME Tweak Tool, go to Shell> find the zipped theme from the box and select it.