1.Make a copy of the .xib in the Finder.
2. Open the copied file in a text editor.
3. Change “com.apple.InterfaceBuilder3.CocoaTouch.XIB” to “com.apple.InterfaceBuilder3.CocoaTouch.iPad.XIB”.
4. Change all instances of “IBCocoaTouchFramework” to “IBIPadFramework”.
5. Search for sizes like {480, 320} and edit them. Or just reopen the file in Xcode and use the GUI to resize items as needed.