/Add-Package /PackagePath: /IgnoreCheck /PreventPending Adds one or more packages to an image. /PackagePath can point to ...

/Add-Package /PackagePath: [/IgnoreCheck] [/PreventPending]

  Adds one or more packages to an image. /PackagePath can point to either 
  a .cab file, a .msu file, or a folder. 
  Use the /IgnoreCheck switch to skip installation of the package if the 
  applicability checks fail.
  Use the /PreventPending switch to skip the installation of the package if 
  the package or Windows image has pending online actions. 

    Examples: 
      DISM.exe /Image:C:\test\offline /Add-Package 
        /PackagePath:C:\test\packages /IgnoreCheck

      DISM.exe /Image:C:\test\offline /Add-Package 
        /PackagePath:C:\test\packages\package.cab /PreventPending

      DISM.exe /Image:C:\test\offline /Add-Package 
        /PackagePath:C:\Windows-KB000006-v1-x86-en-us.msu