Setting up in Radiant
root/map_source(PREFABS / SCRIPTS).
root/map_source/_prefabs/zm/harrybo21_prefabs/. Extract the scripts into
root/usermaps/YOUR MAP NAME/scripts/zm/
There are 6 prefabs: the three teleporters, the mainframe, a ‘black box room’ that the players are moved to for a short time while teleporting (this MUST be covered by a zone - but out of sight - you can have another copy of your starting zone covering this) and a Pack-a-Punch cage prefab, which is optional and is what blocks your access to the Pack-a-Punch until the teleporters are activated on The Giant.
Setting up in script
mapname.gsc and find this:
Underneath it put this:
.zone(right click your map in launcher and click
Open Zone File).
Add this to the bottom:
Recompile and test your map.