Blackberry Storm Keyboard

I need a new onscreen keyboard created for the Blackberry Storm. ? I need the ability to use arrow and tab keys. The primary function of the arrows would allow you to just arrow back over what you have typed in a text message, email, etc. The primary function of the tab key would be if I'm on any website using the Storm browser trying to login, I could use the tab key after typing in a user name so it would go to the password field. This keyboard will need to be ran on startup overriding the exsisting Storm keyboard.