Boot Camp Upgrade to 2.1 Problem

I downloaded the file (BCUpdateXP.exe / 215MB) to upgrade to Boot Camp Ver. 2.1. But when I run the file I get the following error message:
"Error reading from file Cwindows\installer\5c850.msi. Verify that the file exists and tht you can access it."
What's up? Anyone else had this problem?
Help appreciated.
Thanks, Steve
(MacBook w/Leopard Ver. 10.5; Boot Camp Ver. 2.0; Windows XP SP2)

Download the file again. If that same error occurs, you may have to update the Windows installer from MS or you may have a problem with the installer.

BTW, you do not need that update to install SP3 to your Windows XP SP2. SP3 works fine without it - regardless of what Apple recommends.

Regards.