set a prop after get url a stackfile

[thierry]

Hi all,

     after doing: get url http://....aStackFile

     i want to  to set a customProp  of this stack
     and save it on my disk... So, how can i get the Id of
     the stack or the name just after the get url ?
     i know i can do an OPEN IT,
     but i want to do this on the background, silently.

     any clue ?
     
Regards, thierry