You can find here several "-stable" isos for our Sayshell release. This means that they might not contain the latest versions of our packages, but they are stable. It's possible that there's a newer development version in the "-current-iso" directory. The -net ones are "network installs", so it will not be useful for you if you want to do an offline install. From the CD ones, usually only the first and the second CD is enough, download all of then only in case you don't have an internet connection nor a DVD drive. DVDs: the second DVD is optional, download only in case you don't have an internet connection.