How to count member posts from a certain forum ID

Hi.

I need to know how to accomplish this for a project. I need a way to count the member posts from a certain forum ID. In the end it should look like this:

Quote:"Random member" has:

290 posts *this is his normal total post count
5 posts *this is the post count from forum ID 1
10 posts *this is the posts count from forum ID 2

I have been searching for ways to make this work, I have found some applications like the basic points, points economy, and other but all with way to many options and without what I need. Any help with this will be much appreciated.

Thanks