vbulletin install/fix "show images only to registered users"

Hello, I have vbulletin 4.2 forum board. I need that the images and the attached should be visible only for registered users. Other will see "login or register to see image". There are some specific plugin on [login to view URL] but seems not working on my board. Goal: 1) in posts the bbcode [img]url of the image[/img] should be visible only for registered users. 2) Same for attached files Feel free to ask further details