Change domain server in Windows 2000?

I am the network administrator of a small company with a network of two domains. On one of the domains, I have two Windows 2000 servers running Small Business Server 2000. One of them is a domain server, and one is not. My boss would like the one that is not currently a domain server to be a domain server to become a domain server, and the one that is currently a domain server, to cease being a domain server. Is this possible without starting from scratch? If not, I will have to move a whole lot of data from one server to the other, and then reinstall all the applications on the other server.