Hi There,
The file you're having problems with seems to be created and used by the BITS service, as you've found:
http://support.microsoft.com/?id=324444I am not certain how the files are problematic, since Windows Installer should only remove them if there's an application that has a File table record for them. Or, potentially, if there's a RemoveFile table record for them.
What I would recommend is opening the *.msi file in direct edit mode (via InstallShield or via Orca) and checking these tables to see if you have records that reference the file. Keep in mind that the RemoveFile table can take wildcards for filenames.
Hope this helps at least point you in the right direction.