Here is a link to all the versions of ZoneAlarm Free and should allow you to download either version 5.5.094.000 or 6.1.744.001. I believe either one was supported on Windows ME although the 5.5 version was a little less "intrusive" on the older systems.
Hope this helps.
I cannot find the link in a search for the last version of Zone Alarm to download.
Doe anyone know what version was the last one that worked with Windows ME?
Looking for a friend.