Quote: "such as "entitywithinzone" and "anywithinzone""
Actually, "anywithinzone" is a working command. It will return TRUE is ANY entity is inside the zone, and if no entities are in the zone, then it will be false. (But be careful since this will include a lot of unnoticeable entities, such as decals)
"entitywithinzone" looks to be the only scripting command that was not finished.
I've replied to your issue with a possible solution, using a command that's not listed in the manual (for good reasons, I suppose)
The one and only,
~PlystirE~