If you want to use GNOME or KDE on your Slackware 10, you'll need two (2) disks.

You can get them either via BitTorrent:
http://slackware.com/torrents/slackw...all-d1.torrent
http://slackware.com/torrents/slackw...all-d2.torrent

Or FTP..
Can't find them on the ftp you provided though, just the md5 and gpg hashes (.md5 and .asc)
They just mirrored slackware..
If you're reading this on ftp.slackware.com, you will find that the
ISO images are not here. This is because we simply don't have the
bandwidth at ftp.slackware.com to provide ISO images.
ISO downloads take a long time, and block people from retrieving
small updates.

If you're looking to download the ISO, consider using BitTorrent.
If there are active torrents available, information may be found on
on http://slackware.com. BitTorrent is available as a package for
Slackware in the /extra directory.

Mirror sites may also have the ISO images up for FTP.

Use the .asc files here to verify your ISO images are authentic.
You can find ftp servers that have them here..
http://www.filesearching.com/cgi-bin...install-d1.iso
http://www.filesearching.com/cgi-bin...install-d2.iso