I have a 2003 Mountaineer that was not satellite ready. I decided to add external f-connectors for satellite using RG-6 cable with runs to the entertainment center and to the bedroom television areas.
It is possible to use the existing exterior cable connection but in our case they had only used Rg-59 cable which does not have the shielding to make a satellite system work at its best. Also, by adding the new exterior connectors for the satellite I can use cable, antenna or satellite by simply switching inputs on the television with the remote.
Here is a link to my website with a description and pictures of the installation:
Feel free to PM or email if I can answer questions.