Insanely basic MP editing question

[roxsman]

I figure I have an insane n00b question but the thing is, I've looked all over the internet trying to find the answer and just can't find it..
I want to make a few DM maps and I know how to do everything I need to do except for ONE thing...
The multiplayer maps that come with ArmA have this "don't go any further, radio activity ahead and you will surely die" border around them which prevents you from wandering all over the island..

HOW can I make this border?! That's all!

Thank you VERY much

[Mandoble]

You might give this a try Out Of Bounds script.

[roxsman]

I'll look into that.. Thanks a lot!