To perform the installations below, please open Cydia on your iPhone; you need to be connected to a WiFi (or EDGE/UMTS) network. Follow any update steps that Cydia requires or suggests.

Five Icon Dock is a library that allows you to add a fifth icon to the dock.
To install, go to Cydia -> Sections -> Tweaks -> Five Icon Dock.

Five Icon Dock needs to be installed, or the number of applications (or gaps) in the dock row needs to be reduced. If you click 'OK', then iFuntastic will install the Five Icon Dock library for you.

Five Column SpringBoard is a library that allows you to add a fifth column to the Home screen pages (excluding the dock.) It comes with an application to toggle it on or off. However, it may interfere with other tools on the phone as well as manual icon rearrangement. I don't recommend the current version for day-to-day use. It is cool, though, so give it a try. In the worst case you will have to redo or reinstall your display order from time to time. You can delete the FCSB Toggle application if you wish, and let iFuntastic toggle it on or off as needed.
To install, go to Cydia -> Sections -> Tweaks -> Five Column SpringBoard.

Five Column SpringBoard needs to be activated, or the number of main page columns needs to be reduced. If you click 'OK', then iFuntastic will activate Five Column SpringBoard for you.

Five Column SpringBoard needs to be deactivated, or the number of main page columns needs to be increased. If you click 'OK', then iFuntastic will deactivate Five Column SpringBoard for you.

Click 'OK' when you are ready to continue or 'Cancel' to do nothing.