Here is a guide to install the WOW-2 Theme on Ubuntu 13.04. Visit the WOW-2 theme page on deviantART. Note: If you already have the .themes folder you can skip the mkdir .themes step.
To download and install the WOW-2 theme open a terminal window (press Ctrl+Alt+T) and copy+paste the following lines:
Click here to download the WOW-2 theme
When the installation is finished you can close the terminal window and to use the WOW-2 theme you can change themes using Ubuntu Tweak.
To start Ubuntu Tweak and to make the WOW-2 theme your default theme follow the steps below.
To start Ubuntu Tweak press the SuperKey and type: ubuntu tweak
Click on the Tweaks button
Click on the Theme button
Click on the Gtk theme button
Select the WOW-2 theme you like
Click on the Window theme button
Select the WOW-2 window theme you like
Close Ubuntu Tweak when done