Hi, I am considering d/l xcode from the app store on my MacBook Pro in order to enable multi-touch gestures on my iPad 2. Few questions - 1. Is it safe to do this? 2. Will it screw up my iPad 2, make it freeze or brick it? 3. Will it void any warranty? (I have to take it back to the Apple Store in a week to have it replaced due to bad screen/light bleed) 4. Can I easily remove it off the iPad by simply restoring the device? Thanks!