2008 08 Ford Mustang The Slide Key & Remote Combo Remote Programming: Most remotes take 3-5 minutes to program This device comes with FREE programming instructions and will be included with your purchase. The instructions are quick, easy to follow and take just minutes to complete. They're written so first-timers can do it themselves without the time, hassle, and expense of committing to a dealership service appointment. Key Cutting/Programming: Programming this key requires 2 working keys. If you do not have 2 working keys, you will need to have the key programmed at a locksmith or dealership.