You should have read the LFSLapper forum.
However.
If you open the LFSLapper.lpr file, and search for the 
Drifting options section, you'll see that some of the Events start with 
/* and finish with 
*/
For example,
/*
Event OnDriftScore()
    privMsg( "Score: ^7" . $DriftScore . " ^3" . $LastDriftScore );
EndEvent
*/
This would normally tell lapper to put message on screen when a certain score was reached.
But.  Because there is a 
/* at the start and a 
*/ at the end of the event, then lapper ignores everything in between.
Lose the asterisks and forward slashes,
Event OnDriftScore()
    privMsg( "Score: ^7" . $DriftScore . " ^3" . $LastDriftScore );
EndEvent
 and your drift section will start to work.
It's a bit like the hash (#) mark at beginning or part way thru line of text.  This tells lapper to ignore everything in the line afterwards.
So.
# = ignore any and all text afterwards on that line
/* = ignore everthing until after 
*/
This information, and lots, lots more all well documented on old Lapper forum - 
http://www.lfsforum.net/showthread.php?t=25756