I want to fit a mondeo double din, sat nav system is it possible? And what do I need?

It's a mk5 with triple deck rds4500 cd unit at present

 

I had a triple deck in my MK6 2003 Fiesta and swapped it for an alpine double din. All I done was cut the bars out and bought a fascia which included the aerial adapter and the iso adapter. Everything then basically just slotted in like it came out, it's pretty simple to be honest. Make sure the radio comes with a cage etc though