Try this.
- Change your quit message (in mIRC options) to: $myquit
- Create an alias in your mirc script remotes tab like this:
alias myquit raw quit : $+ Your unicode quit message.
Replace the text after $+ with whatever unicode message you want. The : $+ must remain though. I don't use unicode, so I don't know if the $utfencode and $utfdecode identifiers may be useful. Other unicode users may have more insight on using those identifiers.
Note: this will only affect the message that is automatically sent when you click the disconnect (lightning bolt) icon on the mIRC toolbar.
-genius_at_work