Working with WIM files
Here are some of the dism commands I use most frequently.
Mount a WIM file
dism /mount-wim /wimfile:”D:\path\to\wim\file” /index:1 /mountdir:D:\mount
Dismount a WIM file with commit
dism /unmount-win /mountdir:D:\mount /commit
Dismount a WIM file with discard
dism /unmount-win /mountdir:D:\mount /discard
Add a package to a WIM
dism /Image:D:\mount /Add-Package /PackagePath:”C:\Program Files (x86)\Windows Kits\8.0\Assessment and Deployment Kit\Windows Preinstallation Environment\x86\WinPE_OCs\WINPE-MDAC.cab”
Display a list of the currently mounted WIM’s
dism /get-mountedwiminfo