on :TEXT:!insult:#: {
if ($2 == $null) {
msg $chan Hey $+($nick,...) $read(insults.txt)
}
else {
msg $chan Hey $+($2,...) $read(insults.txt)
}
}

OR EVEN BETTER.

on *:TEXT:!insult*:#: msg $chan Hey $iif($2,$2,$nick) $+ ... $read(insults.txt)

Sorry, i just did your entire code in 1 line, i wish i was nicer but im a deviant >:P. 122 scripts 1 lined!