How to install from behind an unco-operative firewall:
Use a web-browser to access http://qtinstall.apple.com/us/mac/
Download the three VISE* files to your system.
Find a recent vintage apache server inside your firewall. The server has to support byte-range downloads apache 1.3.x does this, but I don't know about the others. Apple used apache. Create a /us/mac/ location on that server and place the VISE files there.
Create a :System Folder

references:Hosts text file with the line:
qtinstall.apple.com A IP_of_your_apache_server
Go to the TCP/IP control pannel and make sure that the hosts file option points to the right file.
Run the QT4 installer.
The Basic Playback and Deluxe Playback work, but Quicktime Authoring stalled out on me. I haven't debugged that part.
Good luck.
[This message has been edited by HJMelton (edited 04-22-99).]
[This message has been edited by HJMelton (edited 04-22-99).]