During gameplay: 
CTRL+SHIFT+F8   Change map color
CTRL+SHIFT+F9   Repair damage
CTRL+SHIFT+F10  Clear black flag

At the Track Selection menu: 
While selecting a track, hold down S or R to choose the 
type of weather
        (sunny/rainy)
Hold down M while selecting Single Race or Quick Race 
to enable the missile.  Then fire it using the HUD toggle key.