InstEd provides a method for updating the file details (Version, Language, MsiFileHash entries) from the File table.
Select the File table entries that you wish to update, right click on one of them, and select "Retrieve file details from external path".
The source path of the file's component's directory entry is used to locate the source file, from which the details are retrieved.
The files are searched for in the uncompressed external source path location, regardless of whether the files are compressed. It does obey the short/long filename option in the SummaryInfo settings.
This process can be used to check that all the files are in the correct source locations.