Of course you will have 7600 files, SP is an update to the RTM system, not a new system, it doesn't replace all of its components install_wim_tweak /p C:\mount /c Microsoft-Windows-Common-Modem-Drivers-Packagedism /image:C:\Mount /remove-package /packagename:Microsoft-Windows-Common-Modem-Drivers-Package~31bf3856ad364e35~x86~~6.1.7601.17514install_wim_tweak /p C:\mount /h /c Microsoft-Windows-Common-Modem-Drivers-Package