Configuration file for Yast1

Does anyone know of a configuration file for Yast1 where the default FTP address for retrieving packages for installation is stored? The built-in address is at SuSE, but I often get bumped off because the server is too busy, and to retry I have to go through the whole selection procedure again. I'd like to set the default to download.sourceforge.net, which is the official principal US mirror. Paul Abrahams