From: Roger on
Mike,

I did that some time ago. No problem really just go to
http://support.microsoft.com/kb/950249
cheers

Mike S wrote:
> Is there any way I can re-install SP3, even though it's already
> installed? I am unable to remove it using the control panel, appwiz.cpl,
> or c:\windows\$NtServicePackUninstall$\spuninst\spuninst.exe.
>
> Is there a way I can manually corrupt or remove enough of it, or is
> there a registry key I can change, so the installer will not detect that
> it is installed and re-install it?
>
> Thanks,
> Mike