I bet ur SES light is the dreaded "evap system leak" code. It could be ANYTHING from a faulty gas cap to a bad vaccum hose somewhere to a bad EGR DPFE sensor. Go by Autozone and they can check it for u 4 free.
The local Ford dealer would have to plug up ur SUV and retreave the keyless code (for a fee). They would also have to reprogram a new key fob for u there (with the SUV there too of course)....
I would go to
www.helminc.com and get urself a Ford owners manual and/or service manual though...
Or maybe get lucky and find one on Ebay.