Or maybe make some work around scripting a trigger. It's my understanding that triggers can only be done via the .git file. Maybe there is a way to spawn an invisible placeable or something and when the pc gets into a certain range/proximity - , it acts like a trigger and fires whatever script, dialog needed.
The modder could get his desired coords via the whereami armband, enter it into the script to create his "trigger area". Thereby making the trigger area as big or little as needed.
May prove helpful...