At this time the full install is not available for Linux. The second option is import or export. The export version only has 40 bit encryption, and is the only version allowed outside the US and Canada. There are two different versions for Linux. One is for the old 1.2 series kernels and one for the new 2.0 kernels.
Beta versions are also available.
They have menu's to guide you through the selection. Going through the web site is the only way to get the import versions. If you want an export version you can download them directly from the Netscape FTP servers. The FTP servers are also more up to date. For example when I first wrote this the web interface did not have the non-beta 4.03 for Linux yet, but it was on the FTP site.