Still stuck on the scroll

I’m just having a devilish time trying to get this scroll think to work. I’ve been pointed to many tutorials but none of them give me a clear idea on how to do this. I’ve attached the fla I’m working on…if somenone could open it up and look at my ActionScript and tell me what to do or modify to make it work. I’m not having a problem getting it to scroll, but I can’t figure out how to make it stop at the top and bottom of the page. I’m thinking a “get boundaries” function is in order, but I really just don’t know how to incorporate that.

Thanks for being patient people!

http://www.kirupaforum.com/showthread.php?s=&threadid=11677

Go here and download the tutorial i have a Key press scrolling one maybe thats more helpful