This tutorial will teach you how to install a theme.

All IPS themes are in .xml format. If you downloaded a .zip file, extract the file first; You will find the .xml file inside.

In the AdminCP, navigate to Customization -> Themes. Click the Create New button.

And then click on the manual upload link.

Select the xml file for your theme from your computer.

Click Next, and after a second or two the IPS Community Suite will finish installing the theme and return you to the theme list. That's it! Your theme is installed and ready to use.