PM Hack on vBulletin 1.1.3

I have seen the Private Message Hack on lots of vBulletin powered boards that have a version number of 1.1.3 yet is says it's for 1.1.4 only. I then tried installing it but I can't find this code:

5. showthread.php
-------------
Find:
~~~~~~
$posts=$DB_site->query("SELECT post.dateline as dateline,post.postid as postid,post.pagetext as pagetext,
                               post.allowsmilie as allowsmilie,post.signature AS showsignature,post.title as title,
                               post.ipaddress as ipaddress,post.iconid as iconid,post.username as fakename,
                               post.userid as userid, 
                               user.userid as userid,user.email as email,user.username as username,
                               user.usertitle as usertitle,user.signature as signature,user.showemail as showemail,
                               user.homepage as homepage,user.icq as icq,user.aim as aim,user.yahoo as yahoo,
                               user.joindate as joindate,user.posts as posts 
~~~~~~

Attach to the end (after user.posts as posts):
~~~~~~
,user.receivepm as receivepm
~~~~~~

I couldn't find that in the code but I found something similar to that:

$posts=$DB_site->query("SELECT dateline,postid,pagetext,allowsmilie,signature AS showsignature,title,ipaddress,iconid,username,userid FROM post WHERE threadid=$threadid AND visible=1 ORDER BY dateline $postorder LIMIT $limitlower,$perpage");
while ($post=$DB_site->fetch_array($posts))

How do I adjust all the code to fit Version 1.1.3, I need help with every file that needs to be adjusted as I don't know what you do to get it on 1.1.3 or better yet is their a version available that works for 1.1.3 that you can still download?

get 1.2.0

Why don't you upgrade to 1.1.4 ?

It was enough trouble getting 1.1.3 installed as I had to go through all these steps and it is working fine right now, I don't want to mess up a stable board.