Requires ColorKeyboard Tweak from cydia. This package is free for anyone who has bought 3D HD. To install on your phone after downloading. Go to Settings/ColorKeyboard Select the 3d Keyboard and select the 3D Popup. Once selected hit save in the top right corner.
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http://www.ihackstore.net/2012/12/15/3d-hd-inferno-colorkeyboard-1-0-newpaidthemes-keyboard/