I don't know if this happens to any of you too, but there seems to be a bug with the NewGen editor. When you modify a handle value, no options as to 'Triggering unit' or 'Picked destructible' etc appear. You cannot set handles for use with hashtables or such.
Example Image: http://img101.imageshack.us/img101/1576/whatthebs.jpg
Example Image: http://img101.imageshack.us/img101/1576/whatthebs.jpg