Your name and e-mail address, under Mail and Newsgroups, Identity.Cache, under Advanced to compare every time, instead of once per session.
You should download them to the downloads directory and install them as a rpm packages. You will need to download two files (netscape-common and netscape-communicator), presently for version 4.8. The latest version of Netscape Communicator can be downloaded from RedHat as rpm.
Before you start, I suggest you create a downloads directory in a user account ( /home/user/downloads) to store the compressed and rpm packages as you download them. This tutorial covers the download, installation and setup of Netscape Communicator, RealPlayer G2, Adobe Acrobat Reader, XDIR (a graphical FTP application), asWedit (an HTML editor) and the Java Development Kit (IBM version for Linux). Net applications Guide to some basic Internet applications