When automating the uninstallation of Office 2003, we can call msiexec to perform the work from a command line.

Example syntax:
msiexec /x {GUID} /qb

*note*
You could use /qb for an automated uninstall with a progress bar, or use /qn for a totally silent uninstall.
You could also use a /norestart switch to prevent a reboot of the machine after installation.
The GUID for the Office 2003 products is different depending on which version of Office 2003 you are using.

To find the GUID for Office 2003 products look at the following registry key:

x86 OS
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{GUID}

x64 OS
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\{GUID}

The GUID for Office 2003 will be similar or equal to {90110409-6000-11D3-8CFE-0150048383C9}
The GUID may be slightly different then what I have listed here. Verify you found the correct GUID by verifying the product under the “Displayname” key listed in the GUID.

Here is a screenshot of this registry key on my machine

Capture_thumb[2]

So on my machine I can automate the silent uninstallation of Office 2003 via the following command line:

Msiexec /x {90110409-6000-11D3-8CFE-0150048383C9} /qn /norestart