http://www.askmehelpdesk.com/advice/t-21062.html

Yes, after posting the question, I kept looking and found the answer. It did work for my Office 2003.

I found this on the net :

If you do not have the installation cd and want to solve
this issue follow these steps: (works most of the time with
all sku.cab files)

1. Click on start==>run==>type
"excel /s" without quotations and click ok.

2. Once Excel is
up in safe mode with the error message in front, hold
down ctrl+Alt+Delete keys on your keyboard to bring the task manager up.

3. Click on the processes tab==>look for msiexec.exe (only the
onenext to your user name), click on it and end the process.

4. Excel should be running without an error message now==>close
Excel in safe mode==>reopen it one more time in safe mode to
check if it is opening with no error message.

5. Close Excel
/s and open Excel normally, it should work fine.
Edit/Delete Message