This way works:

[Ivan Hoover]

As I said before, your problem is the proxy.
The guys off Netscape have understand for the problems this install 
program makes and have packaged all files in one.
Suck it and try it. I'm d/l now.

ftp://ftp.netscape.com/pub/netscape6/english/6.0/windows/win32/sea/N6Setup.exe