i replaced my ignition switch now need to reprogram new keys what should i need on 2003 Ford Explorer

on 7/06/13 all done right but will not start tried couple things but now im stuck

Asked by for the 2003 Ford Explorer
call dealer four reprogramming sequence
ok thanks will try and get back with you, was told once from ford place they stopped making keys for 2003 models and down!! but ill check this out...