Adding text by default when clicking on "Reply" on vBulletin

This is a small snippet of work I'm looking for where if you click on "Reply" to a user and quick reply is posted below, it'll write out the @username that you're replying to followed by a space: Let's say Charlie made a post Bob made a post in reply to Charlie (by clicking on Reply) The quick reply box drops right below Charlie's post and it already contains "@Charlie " without the quotes. Going to "advanced" will retain this portion of the message (basically it acts as if the user wrote it out himself). The board is vBulletin. This is the feature I am requesting.