Is it just the power to the IP which is not there? That's the only thing affected? If that's the case, that it is ONLY the IP, you can run a wire from the battery positive to the front terminal, the one closest to the radiator, on the IP. Once that is hooked up you start as you normally would. In order to shut the engine off you will have to disconnect that wire. This is a temporary solution, and will not correct other things which have no power, so be sure of what is not working before you start driving.