vB4 How to disable edit option after 30 mins for registered users
 

I have recently started a foum and as i am new to vbulletin 4 i would like to know :rolleyes: how can i disable the edit option after 30 mins after a post is submitted by a user. Also i have created a new user group when i try to upload an image using the user i am not getting the insert image option Please help me.