Centered PopUp

Hi, Im a newbie here, and letme say that its a cool Forum. And before to continue, Im not english speaker, I speak spanish, then sorry my bad english.
So, I got download the tutorial about centered popUp window at this link http://www.kirupa.com/developer/mx/centered_popup.htm
and it is very useful for me, but the problem or trouble is in that this fla file was published for Flash 5, and when I published that for flashv7 in AS2 this file dont work. so I need this file published in v7 AS2, because this file will be inside in other fla with others actions for AS2, in others words I need this file working after it was published in flash7 and AS2. is Possible?, sorry Im introducing in the Flash world.
Thanks a lot, and again sorry my English I just trying.
Greetings!. *or grettings?.