Regarding what somebody said above...
With WarBirds and the option to choose whichever displays you want:
It doesn't work. I always set mine to Feet/MPH, etc.. (Yup, I'm a Yank), but it always shows up on default. I'll tell ya, my first landing in a 190 really sucked!!

Thought I was looking at mph, and lo and behold! It was kph! (kinda throws you off when you think you're coming in way too fast, make a 200 MPH landing soft as a feather

The opposite is true also, I kept stalling well above flight operations speeds. Took me a while to really squint and look at the dang gague.
My point? Oh, yes, I knew there was a reason to this post! My point is: If you install the option to choose whatever displays you want (which would NOT affect reality, it would just save some of us delays in calculating the difference), make sure it works right...

-Freelancer