Limited replies in a forum

[BigJohnson]

How do I make a feature such as a certain usergroup only a total of 5 replies in certain forums? There is more than one forum.

The forum ids that I want there to be on 5 replies max in are

23, 24, 25, 26, 27, 28, 29, 30, 31, 55

Only 5 replies max TOTAL in any of these forums is the limit for usergroup 2.

How would I go about doing such a thing?

And also once the 5 replies are made the user will be given an custum error saying that there limit is up.

PLease help me I am really trying to get someone to create something like this for me.

The other thing to this hack is 5 replies in different threads i mean. So if there is one thread and the user makes 3 replies in one thread in the certain forum then it only really counts as 1 reply counted towards the user.

It only will cont for another reply if the user replied in another forum. So it has to be 5 replies in 5 separate threads.

If you don't understand this please tell me. I will give a better explanation. I hope someone can help me out. Thank you all so much.