osiris4isis
1.
If the iGO is set to a mile then it will be in 300-200=100 miles

2.
Of course it depends on the two numbers. warn_distances and approach_beep_distances

An example for three times

warn_distances="150:700,140:700,130:700,120:700,11 0:700,100:700,90:700,80:700,70:700,60:700,50:700,4 0:700,30:700,20:700,10:700"

approach_beep_distances=200

700-200=500 - first warning
500-200=300 - second warning
300-200=100 - third warning

3.
1 = 192
In speedcamara.txt file put a number 1 or 192