Disconnect battery. Start by taking out the center stack (radio panel), which requires removing the top half of the center console. Lower the steering wheel all the way down and pull on the bezel around the gauges, it will just pull off. Disconnect passenger airbag, there are 2-4 bolts holding it in from the back. After the passenger airbag has pulled out you can unbolt the center 2 air vents (4 bolts) and the far passenger vent (2 bolts and clips in). Back on the driver side remove the sill plate (pull up, it's clipped in) and pull out the kick panel, this will allow you to unbolt and remove the under panel on the driver side dash. This also gives you access to unplug the headlamp switch.
Now I know it's not helpful but thats as far as I've ever disassembled my dashboard. But it's at least a start.
1966 Mustang Sprint 200--Wimbledon White
1998 Mustang V6 Coupe--Silver--RIP, Totalled by brother
2005 Mustang V6 Premium Coupe--Sonic Blue