The latest Salix releases are freely and easily available as ISO image files from the Salix download page, via direct download link or torrent file.
An ISO image is an archive file of an optical disc. It can be easily eendered or burned to a DVD or CD by using media authoring or disc burning software. The resulting CD should contain the contents of the .iso file, but not the .iso file itself; if it does, you have made a mistake in the process. Alternatively, if your system supports booting from USB, a USB stick may be used.