If i were you, i would create a DM Zone with createColRectangle then attach an eventHandler to it. Give us more info about the DM Zone behaviour. When you get inside, weapons are given to you and damage is enabled or viceversa?
You can edit a script (on windows desktop) using notepad++ http://notepad-plus-plus.org/ or ingame running the rar file of the resource you downloaded from the Community. For example
https://community.multitheftauto.com/in ... ls&id=1354 - By Castillo14