[ampedm]

Run all 3 queries in sql - Make sure you change the below queries to your table prefixes if they are not xbtit_

ALTER TABLE xbtit_users ADD COLUMN inv_code varchar(25) NOT NULL AFTER smf_fid

CREATE TABLE IF NOT EXISTS `xbtit_invite` (
  `cip` varchar(15) NOT NULL,
  `code` varchar(15) NOT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1;

INSERT INTO `xbtit_modules` (`name`, `activated`, `type`, `changed`, `created`) VALUES
('invite_code', 'yes', 'misc', '2008-07-01 04:20:52', '2008-07-01 04:20:52')

1 download atachment below

2 to copy:

Modules:
Copy The Invite_Code Folder To DEFAULT_ROOT/modules

usercp.invite_gen.tpl
copy to: DEFAULT_ROOT/style/xbtit_default/

userscp.invite_gen.php
copy to: DEFAULT_ROOT/user/

invite.inc.php
copy to: DEFAULT_ROOT/

and copy the simple invite system folder to hack's folder
than run the hack installer from admin panel..

thats all... if you have problems post replay...