You may find that the OS picks the new hardware up without any problems.
Here's a relevant article you might want to read before starting the project
http://www.smallbizserver.net/Default.aspx?tabid=141.
"MWACSNY" <> wrote in message
news:1A74F647-9F58-427F-B020-...
> The ASUS P4C800e Deluxe motherboard in my client's server went bad and the
> closest convenient motherboard available for repair is an ASUS P4P800e
> Deluxe
> which is virtually identical but it has the Intel 865PE chipset rather
> than
> the Intel 875P. Is it likely that I will need to reinstall SBS 2003 which
> would have to be from the original CDs or will the OS be able to detect
> the
> new motherboard and reconfigure itself accordingly. There has been a
> Service
> Pack update since the original install and only the original SBS CDs are
> available and I recall some kind of bug in that original release - I think
> having to do with the creation of a personal website, but in any case the
> client does not use the feature.