To override any default System Image information for this
    Client in the MOP Client database, whenever System Image
    information is required by the target system for the boot
    operation:

    boot  [node node-id] mop client client-name software id string

    Software Id is an optional argument, but Address and Circuit
    information is required, either from the command line or from
    the MOP Client database.

    Example:

    boot mop client lamchp software id "-1"