You might want to add a check using $play() to prevent it from being abused, such as text scrolling or flooding:
on *:TEXT:!howto:#trommoc: {
if (!$play(#)) {
.play # moccomands.txt
}
}
This way the code can only be triggered one channel per person at a time until it's finished...so you don't have the client running the code to play the text file over and over due to abuse.