Are you referring to a specific modification, or are you asking about getting a shoutbox in general? If you're reffing to a specific modification, I don't believe vB Shoutbox exists anymore, and if it does, you should ask for support in that thread or site.
If you're referring to shoutboxes in general, there's a number of shout/chat boxes available on this site. If you do a search for them, you'll find one you like.
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