On my MacBook Pro I have a small Windows XP installation using Bootcamp for the few times XP using VMWare Fushion isn't working or to slow (CoD4).
Since Service Pack 3 is out for Windows XP I wanted to upgrade but according to Apple first I had to upgrade my Boot Camp 2.0 to 2.1.
So I downloaded the standalone installer; started the installation and after a few seconds without a warning the installation stopped.
Tried to download it another time because I thought the installation image was damaged, but same results. I used the Apple update in Windows but this also gave the same results.
After some Googling I found this thread on the Apple discussion forums; seems I'm not the only one having troubles: http://discussions.apple.com/thread.jspa?threadID=1498651&tstart=0.
Many suggestions, many solutions, some work, some don't. But what seems to work for one person didn't work for another; so there isn't one fix for the problem it seems.
The following fix worked for me:
run regedit search for Boot Camp-services (others seem to use Boot Camp Services) change the language to 1033 (decimal) (mine was 1043) run installer again and presto
Now installing Windows XP Service Pack 3.

Well done, the fix works also for Vista Business FYI.
Thank you.
Posted by: Emiliano | 28 May 2008 at 02:07
How on earth did you figure out this? I am impressed -)
Thank you - it worked fine. In Norwegian services is "tjenester" Otherwise just follow the receipt
Posted by: Niels Peter Hansen | 02 June 2008 at 18:49
Superb! A simple solution that really works. In the Registry Editor, I had to look for "Boot Camp-Dienste". Then I changed the language from 1031 to 1033 and run the installer. Went without a hitch.
Posted by: Willy Kunz | 04 June 2008 at 20:34
Great ! Worked on Norwegian Vista Ultimate 64 running on Macbook Pro. (find "boot camp-tjenester")...
Regards
Posted by: Charles | 11 June 2008 at 09:40
Wow! How did you figure this out?! Worked great for me (WinXP Pro 32, swiss-french). Thanks!
Posted by: Emy | 26 July 2008 at 14:45
You are the man :)
It worked just fine, winxp sp3 bootcamp 2.0 -> 2.1 updating.
Thank you so fucking much!!! :D
Posted by: Thank you from Portugal | 14 December 2008 at 04:25
u rock!
Posted by: Vasco from Portugal | 10 March 2009 at 21:07