For Install images: - WDSUTIL Options /Set-Image /Image: /Server: /ImageType:Install /ImageGroup: /Filename: /Name: /Description: ...

For Install images:
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WDSUTIL [Options] /Set-Image /Image: [/Server:]
     /ImageType:Install [/ImageGroup:]
     [/Filename:]
     [/Name:]
     [/Description:]
     [/UserFilter:]
     [/Enabled:{Yes | No}]
     [/UnattendFile:]
         [/OverwriteUnattend:{Yes | No}]

[/ImageGroup:]     The image group containing the image to
                                     be modified. If not specified and only
                                     one image group exists on the server,
                                     that image group will be used by
                                     default. If more than one image group
                                     exists on the server, then the image
                                     group must be specified.
[/Filename:]              If the image cannot be uniquely
                                     identified by name, the file name must
                                     be specified.
[/Name]                              Sets the name of the image.
[/Description:]         Sets the description of the image.
[/UserFilter:]                 Sets the access controls on the image. The
                                     filter string must be in SDDL format.
                                     Note that unlike the /Security option
                                     for image groups, this option only
                                     restricts which users can see the image
                                     in the Setup UI, and not the resources
                                     for the actual file.
                                     To restrict access to the file
                                     resources, and access to all images
                                     within an image group, you must set
                                     security on the image group itself.
[/Enabled:{Yes | No}]                Enables or disables the image.
[/UnattendFile:] Sets the full path to the unattend file to
                                     associate with the image. For example,
                                     "D:\Files\Unattend\Img1Unattend.xml".
    [/OverwriteUnattend:{Yes | No}]  If an unattend file is already
                                     associated with the image, this setting
                                     determines whether it will be
                                     overwritten. The default is No.


EXAMPLES:
---------
To set values for a boot image:
WDSUTIL /Set-Image /Image:"WinPE boot image" /ImageType:Boot
/Architecture:x86 /Description:"New description"

WDSUTIL /Verbose /Set-Image /Image:"WinPE boot image" /Server:MyWDSServer
/ImageType:Boot /Architecture:x86 /Filename:boot.wim /Name:"New Name"
/Description:"New Description" /Enabled:Yes

To set values for an install image:
WDSUTIL /Set-Image /Image:"Windows Vista with Office" /ImageType:Install
/Description:"New description"

WDSUTIL /Verbose /Set-Image /Image:"Windows Vista with Office"
/Server:MyWDSServer /ImageType:Install /ImageGroup:ImageGroup1
/Filename:install.wim /Name:"New name" /Description:"New description"
/UserFilter:"O:BAG:DUD:AI(A;ID;FA;;;SY)(A;ID;FA;;;BA)(A;ID;0x1200a9;;;AU)"
/Enabled:Yes /UnattendFile:"\\server\share\unattend.xml"
/OverwriteUnattend:Yes