[expertpk]

I have purchased a database of invision power board from somebody. With 200,000 users. Before I also have 1000 users and some threads. Now I wish to merge both databases so my old users and threads should remain and other database users will also add to my ipb. I have tried it my self but when I import data base my old database users and threads gone. Their I also have another problem that I don't know the password of admin for new data base. Can any body help me how can I merge two databases. Or how can I reset the password of new data base.Thanks in advance. Any help will be greatly appreciated.