What Netscape File?

[Aaron Prohaska <verdesoft verdesoft net>]

I want to download Netscape 4.51 from the Netscape site, but don't know
what unix file to download. There seems to be a Linux 2.0 under Unix and
one under un-supported Unix. What do I get? Once I have the tar.gz file
to install how do I know where to untar it?

Thanks,

Aaron