After editing your update-post-counters.php to use limit and startat points, I've managed to install this hack.
Here is why the hack is at the moment worthless for existing bulletin boards:
Pitfall 1:
Users will now show in all of their existing posts totalposts/totalposts.
Eg, if I had 3000 posts so far, all my posts up to now will show 3000/3000 -- not very informative.
Pitfall 2:
If I delete a post, or an admin deletes a post, the currentpost will be bigger than the total posts.
Eg, if to use the same example as above, all my posts up to now will show:
3000/2999
....
Sorry, but only a new Bulletin Board owner should use this hack. It's worthless for boards that have been operating as long as I have
If you want to make it valuable, you need to change it to:
ORDER BY dateline ASC
and add $postcount = 1 before the loop, and $postcount++ after the loop. That will at least solve pitfall #1. It won't solve pitfal #2. Nothing normal will.
Either way, a word of warning: installing this hack takes, on moderate to big boards, close to one hour. And it takes a LOT or resources.