My ipod is s100 iriver how can i change themes

<p>Vivid is a set of custom themes available for your iPod Touch in Cydia App Store. Vivid Themes change the look and feel of your iPod Touch device with custom backgrounds, menus and icons. Cydia is an alternative to the Application Store, found on jailbroken iPod touch devices. Download and install themes Vivid directly to your device from the Cydia app store. <br /> <p><br /> <p>1. Touch the "Cydia" icon on your jailbroken iPod Touch. <br /> <p><br /> <p>2. Select "Search" icon and type in "Vivid" in the search bar Cydia. Select "Search". <br /> <p><br /> <p>3. Select "Vivid" to the list of available applications. <br /> <p><br /> <p>4. Tap the "Install" button. <br /> <p><br /> <p>5. Tap the "Confirm" button to download and install the application on your device Vivid iPod Touch. <br /> <p><br /> <p>6. Select "Reboot Device" button. <br />