Note: This procedure involves editing a game file; create a backup copy of the file before proceeding. Use a text editor to edit the "settings.qvm" file in the "common\ai" directory in the game folder. Change the line "BaseData bool8 DangerTimeout[0..100]" to "BaseData bool8 DangerTimeout[0..001]". You will now be ignored by enemies as long you are not inside a tank or other vehicle.