Quick help needed for limiting PM's

[CP,]

hi there im trying to install a hack which does not allow new users to pm unless they have an x amount of posts, i'm following this hack https://vborg.vbsupport.ru/showthrea...light=posts+pm

i'm stuck here and dont know where to go nor where to find it, the instructions are not so clear:


###################### AddAdmin Options
Making sure you have the $debug variable in config.php
go to your admin control panel (http://yourdomain.com/vbulletin/admincp/)
and then click Vbulletin Options >> VBulletin Options >> Edit Settings >> Add new setting

Enter the following as follows:

1) varname - minpostpm
2) Setting Group - Private Message Options
3) Minimum Post Count
4) Insert the minimum amount of posts a user must have to use the Private Message System.
5) Leave the next box blank
6) Default - Instert the number you want to have
7) Display Order - Leave as is
8) vBulletin Default - No




###### End of hack ######

i just cannot find the Add new setting under vb options...., ive got a vb3.0.8 anybody help?