I recently pulled down Linux Redhat 6.0 via FTP & burned a cd from the files I made.. just as with 5.2.. I went into dosutils & made a boot disk..and to my suprise there was no supplemental image file to make a supplemental disk.. I booted to the boot disk made from the 6.0 files & tried to use that with the old supplimental disk from 5.2..no go.. I then booted to the old 5.2 boot disk & used the 5.2 supplimental disk with the 6.0 CD I made.. THAT worked.. I now have Redhat 6.0.. You might want to add a suuplimental disk image file to the ftp mirrors .. the site I downloaded from is funet.fi
6.0 does boot disks slightly different. Instead of using a separate supp disk for ftp, hard drive, smb, installs, there is now a boot.img and a bootnet.img. You will choose the one you need to install with and use that one disk only. boot.img = local cdrom, hard disk installs bootnet.img = nfs, ftp, http, and smb installs. Of course if you need pcmcia support for any of the different types then you will need to make a disk with the pcmcia.img to load but this is not necessary for most workstation installs.