I think that's pretty much out of the realm of possibility. I suspect that, with a lot of work, someone like HCl could probably create a patch that forces the game to display some of the HUD MAT files as textures for the cockpit, but this would only include things like shield displays and such. Other stuff (text, the dots on the radar, and basically anything that isn't a MAT file) would still stay where it is. So, even if this was possible, it would be a whole lot of work for nothing.