Shoutbox

Besides that this script can be optimized extremely and that you used many things and methods which aren't needed (though, it works, so if this is your first script then ):

1. code:

   ---

   ScriptCommands += '<Name>nick1</Name>';
   ScriptCommands += '<Description>Changes the nick to the number 2</Description>';
   

   ---

   From the user's point of view this isn't logical. If he enters a command with a number (eg: 1) he expects that this command performs action 1, not action 2.
   
   
2. /nick2 is an existing command from Messenger Plus!. Your script breaks this functionality. Do not do that....
   
   In fact you don't need all those commands /nick0, /nick1, /nick2, etc if you would use parameters.