Open gameplayobjects.con file, scroll down to the bottom and replace the code there with this:
Code
CombatAreaManager.use 1
CombatAreaManager.timeAllowedOutside 10.000000
CombatArea.create CombatArea_22_16
CombatArea.min 0.000000/0.000000
CombatArea.max 0.000000/0.000000
CombatArea.addAreaPoint -249.684998/-250.282532
CombatArea.addAreaPoint 251.626129/-252.480545
CombatArea.addAreaPoint 245.910492/252.553833
CombatArea.addAreaPoint -242.575607/253.822540
CombatArea.team 0
CombatArea.vehicles 4
CombatArea.layer 2
This will allow you to explore the whole map.