1. Tap on the package you want to download.
2. Tap Install at the upper right hand corner
3. Tap Confirm
4. Lots of words will appear on the screen and it will start downloading.
5. Once it's done, it will go to "Rebooting Data"
6. Then it will say "Reboot Device, Restart Springboard, or Back to Cydia" Tap on that button.
7. Reboot Device and Restart Springboard will restart your device. Back to Cydia will take you back to Cydia
8. You have installed the package.