If you have been unlucky enough to buy or have to install an HP ML115 G5 entry level server I feel your pain. There is a slight issue if you want to use the onboard raid feature with Server 2003, windows setup is going to ask for a floppy with the drivers on, unfortunately the server doesnt have a floppy port. At this point you are going blow the dust off your trust USB floppy drive, but the problem isn’t going to stop there unfortunately.
The raid drivers for ML115 do not include the drivers needed for windows setup to actually read the USB floppy drive correctly. If you try without adding it the windows setup will get about half way before coming to a halt.
Head over to the HP Support Page to get the Raid Driver (Link) , Extract the contents of the folder in the zip on to a freshly formatted floppy. Once you have done that on the root of the floppy you should find a txtsetup.oem , open this in your choice of basic text editor. Add the following lines to to the bottom of the [HardwareIds.scsi.BUSDRV] and [HardwareIds.scsi.RAIDCLASS] sections.
NVIDIA RAID CLASS DRIVER (required)
NVIDIA nForce Storage Controller (required)
Continue the Server 2003 as normal, Bob’s your fathers brother