It would be hard for someone here to help you, no one can say how your theme work, and try to guess will not be easy. You can try look in the help file.
/help on input and /help on text
here is a simple example, untested..
Code:
on *:input:#:{
if ($left($1,1) !== $readini(mirc.ini,text,commandchar)) && (!$ctrlenter) {
echo -at $+($chr(40),$me,$chr(41)) $1- | .msg $active $1-
haltdef
}
}
on ^*:text:*:#: {
echo -mt $chan $+($chr(40),$nick,$chr(41)) $1-
haltdef
}
if ($me != tired) { return } | else { echo -a Get a pot of coffee now $+($me,.) }
What sparta has shown you above will work as requested. You can't change the default output but customize it with a custom event (^) that halts the default. That's the only way to go.