Well you have windows Server 2003 and you want to know how to make a boot disk. Well the below like will show you how.

Windows Server 2003 Boot Disk guide

So you have a copy of windows server 2003, but it isn't bootable. And you need some way to install it. You want to boot to windows server 2003, cause you want to run a server. Well I have found the way to make a boot disk for windows server 2003 without having windows server 2003 installed:

Create a Boot Floppy Without a Windows Server 2003-Based Computer
1.) Obtain a copy of the Windows XP Setup Boot Disks for Windows XP Professional. For additional information about how to do so, click the article number below to view the article in the Microsoft Knowledge Base:
310994 Obtaining Windows XP Setup Boot Disks

You must use the Windows XP Professional version of the Windows XP Setup boot disks because the Windows XP Home Edition version does not work for this procedure.
You only need the first disk in the set of six Windows XP Setup boot disks to complete this procedure.

2.) Create a copy of the Windows XP Setup boot disk by using the diskcopy command, and then delete all files on the new disk. The Windows XP Setup boot disk is the first disk in the set of six boot disks for Windows XP Professional.

3.)Copy the Ntdetect.com and Ntldr files from the I386 folder on the Windows Server 2003 CD-ROM to the new floppy disk.

4.)Rename the Ntldr file to Setupldr.bin. You must rename the Ntldr file to Setupldr.bin when you use the Windows XP Setup boot disk or you may receive the following error message:

Boot: Couldn't find NTLDR
Please insert another disk

5.) Create a Boot.ini file on the floppy disk. The following example works for a single partition SCSI drive with Windows .Server 2003 installed in the Windows folder, but the exact value in the [operating systems] section depends on the configuration of the Windows Server 2003-based computer that you want to boot:

[boot loader]
Default= scsi(0)disk(0)rdisk(0)partition(1)\Windows

[operating systems]
scsi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Windows Server 2003"

If your computer starts from an IDE, EIDE, or ESDI hard disk, replace the scsi(0) with multi(0). For example:

[boot loader]
[operating systems]
multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Windows Server 2003"

If you are using scsi(x) in the Boot.ini file, copy the correct device driver for the SCSI controller in use on the computer, and then rename it to Ntbootdd.sys. If you are using multi(x) in the Boot.ini file, you do not have to do this.

6.) Start your computer by using the floppy disk, and then log on to Windows Server 2003.

Hope that helps some of you who need a boot disk for Windows Server 2003 but don't have it installed to create the boot disk.