public function getHelp()
    {
        return parent::getHelp() . <<<EOD

EXTENDED USAGE EXAMPLES (with modules)
  for every action except create you can specify the modules to use
  with the parameter --module=<modulenames>
  where <modulenames> is a comma seperated list of module names (or a single name)

 * yiic migrate create modulename create_user_table
   Creates a new migration named 'create_user_table' in module 'modulename'.

  all other commands work exactly as described above.

EOD;
    }