The hardware is pretty much ancient. You won't get drivers for that card.
Windows Storage Server is a Windows server version that's optimized for. A significant update to its WSS 2003 and called it WSS 2003 R2. Installation 5.1 Installing ServerProtect for Microsoft Windows Server and Novell. Of the printed manuals are available at: 4. Datacenter Edition, x86 and x64, SP1 or SP2 - Windows Storage Server 2003. R2 Standard Edition, x86 and x64, SP2 - Windows Server 2003 R2 Enterprise.
Windows Server 2003 R2 Standard Edition with SP2 Trial (32-bit x86)
disk1: http://download.microsoft.com/download/5/1/C/51C53A00-7F8B-423C-A841-8B9C49B910BF/X13-04874.img
disk2: http://download.microsoft.com/download/5/1/C/51C53A00-7F8B-423C-A841-8B9C49B910BF/X13-04795.img
Windows Server 2003 R2 Standard Edition x64 with SP2 Trial (64-bit x64)
disk1: http://download.microsoft.com/download/F/9/D/F9DA93F8-2814-4B9B-A6A1-EA9B6B7E8BD6/X13-05825.img
disk2: http://download.microsoft.com/download/F/9/D/F9DA93F8-2814-4B9B-A6A1-EA9B6B7E8BD6/X13-05774.img
Use 2003 at your own risk. End of life this month, etc.