I dont think there are any errors in regards to X starting up, why should there be? I havent installed the drivers yet.
Anyway Redhat 7.3 is the latest stable redhat version, its quite new, comes with KDE3 etc.
I tried connecting to ftp.redhat.com (with "ftp ftp.redhat.com" and then issuing the command you gave, it knows the site command but when typing more than that it says unknown command....
Does 3ddiag have a website perhaps?