The Microsoft article at http://support.microsoft.com/kb/316425 implies that it is something to do with the hardware. I see on http://www.intel.com/support/motherboards/server/se7500cw2/sb/cs-006876.htm that Windows 2003 Enterprise was the tested version - do you have a copy of that?
As you see, i tried to install wind2003ent edition. And this OS is supported by this server. However, i'm still unable to be successed.
Even Enterprise fails, huh? Are there any other add-in cards you could remove? Maybe there's something else interfering with the installation.
Have you checked through the known issues at http://www.intel.com/support/motherboards/server/se7500cw2/index.htm ?