Uh, not sure about the install of the software, I have a zip file of it that I just unzip and run from. If you have the floppies, you'll need to run INSTALL from the 1st one out of a dos prompt.
If you are connected, I think, you need hit space bar, that toggles the function keys, and then F6, then I forget exactly which option. But there is one to load the program to PLC.