Lets say, I have a java midlet, what is signed by an other phone carrier (X), and I want to install it, but I am at carrier Y. It tells me that it had a Certificate error, and contact the creator. Now lets say, I have access to system files, and folders (full system access). How could I install this MIDlet, without using the installer, by hand, to work? I mean, icon in the menu, midlet runs correctly, and can be detected by other applications (like appmanager).