Blackberry Curve Vibrate toggle button

I need an application that will allow the user a blackberry curve phone ( and possibly others) to PRESS and HOLD the # (POUND) key for 2-3 seconds to toggle betweeen vibrate profile and normal profile. Pressing the pound key at present on a curve initiates a request from the BB software to assign a speeddial to that key. I'm not certain as to the best way to install eg. OTA, email link etc? Once working, the application will need to be set to a demo mode upon installation, or registered (locked to phone's PIN) Escrow will be deposited upon working product. Funds will be released to the programmer upon receipt of all original code and execuatable code. I will own all rights to code