1999 Taurus - Program Keyless Remote

I bought an aftermarket keyless alarm remote control for my 1999 Ford Taurus and need to know how to program it. It has 4 buttons. The FCC number on the replacement remote is GOH-4BL98. The FCC number on the original (nonworking) Ford alarm remote is GOH3BFM2497.

you have to have 2 working remotes in order to program a 3rd. you cant program a remote if less then 2 remotes. your going to have to go to the dealer and have 2 remotes programmed. your aftermarket remote is useless unless you make it your 3rd remote.