Recode modification from 3.6.x to 4.1.x

[Subah]

Hello,
There is an arabic coder make this modification for vbulletin 3.6.x and i do not found it any more.
this mod has good idea it is for make the vistore register in your forum by 3 ways:
1- Cut a part from your thread and hide it with all the reply from the vistor and they get message ask them to registe if they wanna see the hide part.
2- cut a part from the thread and leave the post apper for the vistor and they get message ask them to registe if they wanna see the hide part.
3- leave the thread and hide all the replys from the vistor and they get message ask them to registe if they wanna see the hide part.
Can any bady recode it ?