Use Your Xperia Play GamePad On the OnLive Service With OnLive Helper
The app should however work with any phone (not just the Xperia Play) and users can create their own custom profiles or use community created ones.
No root is required, and to enable the app, you must change the Input Method Service to ‘OnLive Helper’. Users can have the input method screen automatically come up when opening or closing the keyboard by checking ‘Auto Prompt’ in the options.
For details on how to use custom mode, and for the link to download OnLive Helper, head on over to the application thread. OnLive Helper is free to download in the Android Market.