cj92, you're car has to have the "INFO" button up on the dash as that is what changes the heads up display and changes the MyColor.
And what do you mean when you say you have the plug for the MyColor? It's a standard plug across all 05 Mustangs (with some wires being used, some not).
So what is up on the dash next to the power point if the tributton assembly (INFO, SETUP, RESET)
1966 Mustang Sprint 200--Wimbledon White
1998 Mustang V6 Coupe--Silver--RIP, Totalled by brother
2005 Mustang V6 Premium Coupe--Sonic Blue