How to install a PS3 theme

Okay, here's how to install a theme once you've downloaded it.

1. Plug in a USB memory stick or a memory card and make a folder in the root of the removable disk called ‘PS3′. Inside that folder, make another folder called ‘THEME’ (in caps).
2. Copy the theme (.p3t file) from wherever you saved it on your computer into the ‘THEME’ folder on the removable disk.
3. Put the removable disk into your PS3 and make your way to Settings -> Theme Settings -> Themes.
4. Select the install button, and then click on the removable disk.
5. Select the theme you want to install and click ‘Apply’ for the theme to display.

You can still change your wallpaper while keeping the theme's icons, sounds, etc.