Hall of Famer's Gender Ratio Mod v1.2

[SilverDragonTears]

my doadopt.php looks like this:

$code = rand(1, 20000);
                        $genders = array('f', 'm');
                        $rand = rand(0,1);
                        $petgender = $genders[$rand];
                        switch($petgender){
                          case "f": 
                          $alts = "yes";
                          break;
                          default: 
                          $alts = "no";
                        }

b/c i'm using the alternate gender mod. How do i use it with this?