How do I replace a 2003 BDC with another 2003 BDC on a 2008 Domain

My Primary DC is a 2008 Standard Server SP2

I had a BDC running 2003 and it crashed.  It was also running my fax software for my domain as well as some additional small shared programs.  I have another, newer 2003 Server SP2 and I would like to replace the previous 2003 Server.  I am not sure if the old one was 2003 R2 or not.  Is it possible to completely replace the dead BDC with the new BDC?  I can use the old IP address, Change the server name to the same as the old and recreate the shares.  I would like the PDC (2008) to replicate the AD to this new PC without causing issues.

Can you please advise me on the steps required and the best way to do this without destroying my existing domain or settings?

Thank you in advance.

MJK