Android keyguard screen modification

I need you to develop the prototype which can successfully replace the standard locking screen. Basically I need an app will can: - start on boot - run as service + activity - disable standard keyguard and show itself every time phone is unlocked - honor user's pattern/password protection (show password/pattern screen after user performs 'unlock' action in my app) - work _really_ fast - i.e. it should be able process fast lock/unlocks - like 0.5 second or faster - be nice to incoming/in-progress calls - perform exactly as standard keyguard (hide itself until call is answered/rejected) - right now lock screen should have no desing, no animation. just one button - unlock (no slider functionality is necessary) minimal version is Android 2.2 I do programming myself as well, so no BS or hype, please. Also no standard copy-paste spam from non-relevant people, will be reported.