What is the best way of imlementing this?

[Faykon]

I'd like to have two seperate forums, but they should use the same users database.

Bassically i need these things to be taken from the same tables for both forum.

Currently Active Users:
Threads:
Posts:
Members:
Active Members:

And also to avoid the erros, like someone from forum A trying to look at someone from forum B, selecting his nick from the - "who is online" panel, and so on.

Shortly speaking i need the same user database for both forum, and different topics and posts databases for both forums.

Does anybody could advise something suitable for this?

Thanks in advance.