Anyone know how to add Playground template to XcodeTemplates?

Anyone know how to add Playground template to XcodeTemplates? When Creating new Project I get in iOS section a new iOS Game under the "Imagine Engine"-section; yet I believe it would be cool to have Image Engine Game as template for New Playground.

A copy of /Applications/Xcode.app/Contents/Developer/Library/Xcode/Templates/File\ Templates/Playground/Game.xctemplate may or may not suffice, not sure where to put my very own custom playground template file however.