[Lynne]

If the query doesn't include getting the prefix, then it isn't going to be available to use.

Check the files packages/vbcms/widget/recentposts.php and you will see the query does grab thread.prefixid, however it does nothing with it. You would need to modify the code to actually do something with it. It may be available as {vb:raw post.prefixid}, but that is just the id. You would need to add the code to actually change it to prefix_rich text that you want.