[JS](CS3) More EventListeners...?

Question

I was wondering if they were more EventListeners. I am specifically looking more "Copy" & "Paste" and their specifics "Before " & "After".
Also,
1) What is the difference between [var xxx = app.eventListeners.add(...);] and [app.eventListeners.add(...);]. They both add the event. Obviously one has a pointer to the event. But how usefull is it when the event is associated to a function or pointing to a file to execute? I can't imagine the pointer to the event bein "manipulated" after the event has been defined (var xxx = ...).
2) Is the event "afterOpen" not supposed to trigger AFTER the document is opened? I have defined the event to execute a file and the script alerts me of "No Document Opened!!!". I understand the use of [event.parent] but that forces me to double the scripts that are tied to eventListeners. One regular version using app.activeDocument (accessable w/i User/Script Panel) & a modified version using event.parent (defined in the Startup Script). Are my assumption correct?
Any help appreciated, Alex.

Answer 1

Thanks, Harbs and Dave!
Before I saw your answers I came up with a (longer) solution:
var storyRef = app.activeDocument.stories;
var arrStories = [];
for(var j = 0; storyRef.length > j; j++){
    arrStories.push(storyRef[j])
    }//end for
var arrParas2 = [];
for(var x = 0; arrStories.length > x; x++){
    for(var y = 0; arrStories[x].paragraphs.length > y; y++){
        arrParas2.push(arrStories[x].paragraphs[y]);
        }//end for y
    }//end for x
But I am curious about something. Your solution and my solution both result in an array of all paragraphs in the document but the data browser shows these arrays in different ways. I am wondering how to intrepret them.
Your solution does not show the indexed paragraphs, mine does. See the images below.
Your solution:
My solution: