Haven't tried it yet but....
Create a text file with notepad
Open zonealarm and go to restricted zones settings, try to highlight it all and then copy to clipboard
Go back to text file, edit, paste.
As I said, I don't know if it will work but nothing to loose. Then copy the text file to a floppy. Reinstall your OS. Reopen Zonealarm and see if it will allow paste back of settings.
Let us know how it works, if it does. Little time lost. If it will copy to clipboard and then to the text file it should pasted back into zone alarm,
Good Luck
Bill