[unsungboxer]

I use a carPC with a double din screen. works great!

however your question was if you can use tuning software with a flip out head unit... with today's current headunits there is no support a digital connection to a PC. At the very best all you can do is have RCA input which is not clear enough, nor does it give you touchscreen support over the PC's operating system.

If you are intent on using a flip out screen, there are single din flip-out touchscreen monitors you could interface with a carpc. most of us put the carpc's under the seat and run cables up the dash. However by doing this the PC soley controls audio/video/gps/etc...

see the link in my signature fore pics of my setup.