Domain name change for MS SQL 2005

Any help will be appreciated.
To clarify few things I have no previous MS SQL experience, did some Oracle and MySQL work.
I will have to move one Win 2000 server with MS SQL 2005 running one database to our AD 2003 environment. I was wondering if anybody already went through that kind of scenario, and what was the procedure.
Thanks

let me understand the scenario

you have sql server 2005 running on Win 2000 ADS machine (Same physical machine) and you want to migrate windows 2000 to 2003 and transfer sql server 2005 to new ADS 2003 machine.

is this the requirement?

Madhu

|||I wasn't clear enough.
We have to move a windows 2000 server from one domain to another. That server has SQL 2005 installed and we are using it as our accounting database. We have to keep that server and it's 2005 SQL database functional on our domain. We will not upgrade that server to win 2003. Recently we acquired another company and this is the only problem that is stopping us from connecting both networks.