$torrent->addTorrent($url) issue

[baoky]

$torrent->addTorrent($torrentURL);

I am trying to add a torrent by url , yes its work. But my question is how can i specify the filename of the file so after its torrent finish, it will be rename as the filename i specify or rather when its downloading , it will already be name as the filename.

in simple how can i define the savepath. ( including the filename ) for the torrent.

Thanks

i am using the webui.php provided