I have already downloaded Netscape 4.78 from the Netscape web site

The file is located on the network I: drive

You will need to map a path the network Instructor drive. 

Start the windows explorer

You should see the Instructors Files folder

Right click on the Instructors Files folder

Click on the Map Network Drive option in the menu

Map the network connection to drive G:

Expand the new G: drive

Scroll down to find the David.Raney folder

Expand that folder and locate the Netscape folder