I know now that this is a Desktop motherboard, officially not supported for Windows Server operating systems, but I would still like to get it to work. I've confirmed that the motherboard network works in WinXP (Intel 82579V Gigabit) and typically the 32-bit Windows XP drivers work on Server 2003 as well. Several of the other drivers have installed just fine, but the network driver install package fails with "No Intel Adapters are present." When I try to manually point the driver update to the downloaded package on the CD or extracted (7zip) from the download it doesn't find what it wants. I am trying to install Windows Home Server v1 (based on Windows Server 2003) on this box and just want to get a basic network driver up and running. I've checked the BIOS config, and Device Manager shows a yellow question mark by "Ethernet Controller". The ID is: PCI\VEN_8086&DEV_1503&SUBSYS_20408086&REV_04\3&11583659&0&C8 but I don't really know what to do with that...
Intel usually packages many/all of their network drivers into one package, so you should try the 'generic' Intel PROSet driver set for Windows 2003.
If you search for the Ethernet chipset you've said you have (as I just did), Intel's ARK reports it as needing the same driver.
The latest version (currently 17.3) is available from Intel's Download Center here.