"The installer encountered errors before boot camp could be configured"

I have XP running under BC 2.0, tried everything I  could find on the Web:

• Set locale to English
• Manually unpacking the .msi into .msp, then run msiexec /upgrade *.msp
• Uninstalled the BC 2.0 upgrade, and did a full install from the Mac OS X dvd

None of the above helped.  I sort of gave up on it until I got the XP SP3 update notice.

Spent another hour or so trying out different things, still the same error message, seems going no where, then I noticed I have two Live Mesh video adapters installed.  As the last resort, I uninstalled the two video adapters and restarted the BC 2.1 upgrade for the Nth time.  Wala, it worked!!  Everything went smoothly, after the reboot, I have BC 2.1.  Windows XP Sp3 is next to be installed!

Lessons learned:

Uninstall any Video Adapters that is not installed by Boot Camp 2.0.  You should have only either an ATI or Nvidia adapter under the Video Adapters in Device Manager.

I was trying to add my Vista machine to the Mesh by installing the client app, but keep getting a message, some thing like "This application can be installed on 32-bit US version of Windows XP and Vista".

I could not figure out what went wrong for the past 3 days, almost tried everything I could think of, even wanted to uninstall Vista SP1 .  Finally, 10 minutes ago, I tried to set my location to US, and all things worked!

Thought this might be helpful for other people.