All the options as seen below where I try for getting trigger an ENTITY in a zone.
No worky? Was placed on a trigger zone... then moved an entity into it

function plrinzone2_init(e)
end

function plrinzone2_main(e)
--if g_Entity[e]['plrinzone'] == 1 then <<== **-works-**

--if g_Entity[e]['entityinzone'] == 1 then <<== no work...
--if g_Entity[8]['entityinzone'] == 1 then <<== no work...
--if GetEntityInZone(8) == 1 then <<== no work...
if GetEntityInZone(e) == 1 then <<== no work...

Text(11,11,1,"Object in Zone" )
else
Text(11,11,1,"Not there yet" )
end

end -- main

So I watched Ed "iWork" to see if he knows-- no luck- any ideas?

doesn't look like it works, maybe try amen's solution

Nice helps AM, looks very promising. Thanks smallg.

The GetEntityInZone() command is pants, basically just returns 1 if any entity is in the zone (or is supposed to) but it may only work on specific kinds of entity, I did research it all a while back but can't remember all the details.