Here u set:
Check ON restrict aircraft, Squadron, first player to destroy
Change 10 if u like other.
Change starting radius to 3000, airspeed to 250

When you click realism button, a window wil pop-up:
Here FIRST hit HARD, (that will set 100%)
Second, UNCHEK G efects, so you get the 95% score.

To set desert location, click on START LOCATION button.
A window will pop-up with standart location
be sure that Exact location is checked, then enter N20 and E20
click OK. Now you are in desert. (GET WATTER :p )

Note: I know some people edit config files so when they
host a game no settings are needed. I tryed this and strange
things happens. I recomend to LEAVE ALL CONFIG
FILES UNCHANGED.
Always setup host in the correct way: from the menu. Like is explained
here.