That line is wrong, it looks like the matchtext of the event is a regular expression, however the event is not using the '$' event prefix, meaning the matchtext shouldn't be treated as a regular expression.edit: beat by loki!
The help file documents pretty much everything correctly.
Best mIRC scripting guide is
www.zigwap.com/mirc 
Note: you have no other choice than asking on the 'scripts&popups' section of this forum if you have specific questions (access levels, error messages, random crap)
