How to properly code a pan & zoom function

I am using Adobe Flash Professional CS5, and Actionscript 1&2.

I'm making a map that has tooltips pop-up when you hover over various areas... I'm very much a newbie, and I'm trying to teach myself flash as I make this rather complicated project... so please bear with me.

I want to be able to zoom in on the map, and then, once zoomed in, to be able to pan around the map by dragging (like a Hand Tool). However, I've encountered some problems, as I have no idea whatsoever how to properly do either of those things.

For the zooming, I put a button in either corner: a zoom out icon, and a zoom in icon. For the zoom-in icon, I used the code

on (rollOver){
setProperty ("BG", _xscale, "200");
setProperty ("BG", _yscale, "200");
}

(BG being the name of the instance used for the background of the map, which is a movie clip.)
Now, this zooms me in well to one corner, but then i still can't drag, and another problem I've found is that the tooltips did not scale with the background; they still show up if you hover over where they would have been. So, how do I properly do this?
The code for zoom-out is the same, only switching back to 100. I do like how the zoom in and out icons stay in the corners no matter what, though, so I need a way to keep the tooltip buttons with the parent BG, but not the zoom icons.

And as for dragging and panning, I've looked everywhere for a simple tutorial, but I haven't found one. I've tried adapting several different source codes to do what I want, but I'm afraid I'm rather out of my depth.

Would somebody mind taking the time to outline step-by-step, in simple terms, how I can achieve what I want?

Well, I figured out how to get the tooltips to stay assigned to their correct places at least, I think. I wasn't putting them nested within the BG movie clip before, which was silly of me. So that's solved, but I'm still pretty lost on everything else.

So, looking over this again, basically all I'm looking for is for some piece of code that will trigger when I zoom in that allows me to drag to pan/scroll around the stage (not to drag the background itself), that can be untriggered when I zoom out.

I would be happy with something that works like the first example on this page, if someone could explain how I would go about making it work. I am unfamiliar with how classes are used.