[Guide] Things you will need to install this theme:
iPhone/iPod Touch with 2.2.1 Firmware (Tested, might work with older firmware)
Categories V2.23 (Tested, Might Work with older version)
Download Categories V2.23 via Cydia.
Once downloaded make two new categories by clicking on the Add tab on the top right. Call the first one “Games” and the next one “Apps”.
Then place all your games into the Games folder. Next place every app into the Apps folder except for: Clock, Calculator, Notes, Videos, Photos, Settings, Mail, Safari and Music/iPod. Its also a good idea to add apps like Winterboard, Terminal, Categories to the SpringBoard settings Dock.
Install the blank webclips. To do this place the blank webclips (provided) in the folder: /Private/Var/Mobile/Library/Webclips (You will need a software like sshfs, if using Mac OS X or WinSCP, if using Windows).
We now need to install the iNav UI. Do this by placing the iNav folder into: /Library/Themes
Set the blank webclips so that there are 10 webclips in each page and then the application icon (11th icon). Also set Settings, Mail, Safari, iPod/Music icons on the main dock.
Go to Winterboard and select the iNav theme and also the option “No Undocked icon Labels”. Make sure this is above the theme. Respring SB and you are all done!