Wow thanks, will try that script tomorow.

How about setting a ftp server on the classic Mac, say with NetPresenz, setting the script to regurally read a text file in a certain folder shared by the ftp server, then when you upload a text file with proper command into that folder it could trigger the script to shutdown...

Still the problem, as you say, is the delay option absent on early AppleScript.

Or wait... If Cron Manager could just launch a script at certain time, it could trigger any script uploaded into the ftp server.