How can I fix my former nav tab to work for vb 4.2

[Jeremy8]

Before 4.2 I had a nav tab for a chat room. I used a hook to display the number of users in the chat room in the tab's template. For example, the tab would say "Chat: 8" if 8 people were logged in. Before 4.2 you could put the nav tabs in any order because of the hooks etc, but now theres only hooks for before or after the ones in the manager.

How can I do this now in the manager or with a template?