Hi,
you can put the following into your remotes (alt+r):
on *:TEXT:*:*: if $+(*,$me,*) iswm $strip($1-) { splay alert.wav }
Then simply put a sound file in your mirc folder.
(If you use another file, like e.g. ring.mp3, then you obviously have to change the code to { splay ring.mp3 }
However, there is a built-in function for this in Mirc. Go to Tools -> Options -> Highlight. Once there, enable 'Highlighting', and click on 'Add'.
Then simply put in the following:
$meand click on the button 'Play Sound', where u can choose a sound/song to be played everytime that your name is mentioned somewhere.
I would definitely go with the built in Mirc function.
Greetz