As long as you know the ImageIndex, ImageName, or the EditionId of the Windows Image that you want to import, you can automate Import-OSMedia with the SkipGrid parameter
ImageIndex
Odds are you won't know the exact ImageIndex, so this will probably not get used that often, but its here!
Import-OSMedia -ImageIndex 7 -SkipGrid
ImageName
You have several options for ImageName that can be used, so make sure you use a valid option