SWITCH:
{
    $operatingsystem eq "170" && do {
        $Folder = "winvista";
        $Readme = "readme_winvista.txt";
        last SWITCH;
    };
       
    $operatingsystem eq "173" && do {
         $Folder = "winvista64";
         $Readme = "readme_winvista64.txt";
        last SWITCH;
    };

    $operatingsystem eq "119" && do {
        $Folder = "winvxp";
        $Readme = "readme_winxp.txt";
        last SWITCH;
    };

    $operatingsystem eq "210" && do {
        $Folder = "winxp64";
        $Readme = "readme_winxp64.txt";
        last SWITCH;
    };
    .
    .
    .
};