I've uploaded a zip file in it are the missing files and reg file. The reg file is used to add the take owner ship to the right click menu in explorer. Go ahead and merge that file with your registry.
Once that is done go to C:\Windows\servicing\ and right click on Packages and click on take ownership. You will now be able to copy the files into that folder.
The missing files that are in the folder that i've uploaded need to be placed in C:\Windows\servicing\Packages\ folder.
Then run the pre-scan again, put a check on the box to have it add the cat files back to the database.
(THIS REPAIR IS USER SPECIFIC IF YOU ARE HAVING ISSUES WITH MISSING CAT OR MUM FILES MAKE A POST IN COMPUTER HELP AND I WILL HUNT DOWN THOSE FILES FOR YOU)