/Architecture:{x86 | ia64 | x64 | arm} The architecture of the boot image to transmit using multicasting. Since it is possible ...

/Architecture:{x86 | ia64 | x64 | arm}
        The architecture of the boot image to transmit using
        multicasting. Since it is possible to have the same name for
        boot images of different architectures, you should specify the
        architecture to ensure the correct image is used.

[/Filename:]
        If the source image cannot be uniquely identified by name, you
        must specify the file name.


For install image transmissions:
--------------------------------
WDSUTIL [Options]
        /New-MulticastTransmission
        /Image:
        [/Server:]
        /FriendlyName:
        [/Description:]
        /TransmissionType: {AutoCast | ScheduledCast}
          [/Time:]
          [/Clients:]
        /ImageType:Install
        [/ImageGroup:]
        [/Filename:]

[/ImageGroup:]
        The image group that contains the image to transmit using
        multicasting. If not specified and only one image group exists
        on the server, that image group will be used. If more than one
        image group exists on the server, then the image group must be
        specified.

[/Filename:]
        If the source image cannot be uniquely identified by name, you
        must specify the file name.

EXAMPLES:
---------
To create an AutoCast transmission of a boot image:
WDSUTIL /New-MulticastTransmission /FriendlyName:"WDS Boot Transmission"
/Image:"X64 Boot Image" /ImageType:Boot /Architecture:x64
/TransmissionType:AutoCast


To create an AutoCast transmission of an install image:
WDSUTIL /New-MulticastTransmission /FriendlyName:"WDS AutoCast Transmission"
/Image:"Vista with Office" /ImageType:Install /TransmissionType:AutoCast


To create a ScheduledCast transmission of an install image:
WDSUTIL /New-MulticastTransmission /FriendlyName:"WDS SchedCast Transmission"
/Server:MyWDSServer /Image:"Vista with Office" /ImageType:Install
/TransmissionType:ScheduledCast /Time:"2006/11/20:17:00" /Clients:100