I'm not sure how to get packages added to the extra directory, but the site www.linuxpackages.net specializes in Slackware packages and has many packages that you can't find on the official Slackware CD or FTP site.
I'm not sure how to get packages added to the extra directory, but the site www.linuxpackages.net specializes in Slackware packages and has many packages that you can't find on the official Slackware CD or FTP site.