That's a really stuffty name for your forum account.
On topic: I wouldn't recommend doing this as a console command, but rather making an add-on folder for this.
messageClient(%client,'sound',"message"); is the function you want, so for example:
function serverCmdModHelp(%client)
{
messageClient(%client,'',"\c6This is the first line" NL "\c6This is the second line");
messageClient(%client,'',"\c6This is the third line");
}