def METHOD_NAME(self):
    """
    Actual installation for versions prior to 2021.x
    - create silent cfg file
    - execute command
    """
    if LooseVersion(self.version) >= LooseVersion('8.1'):
        super(EB_itac, self).METHOD_NAME(silent_cfg_names_map=None)
        # itac v9.0.1 installer create itac/<version> subdir, so stuff needs to be moved afterwards
        if LooseVersion(self.version) >= LooseVersion('9.0'):
            super(EB_itac, self).move_after_install()
    else:
        silent = """