If we use relative paths to address an element in an XML document, the current location (our context) is very important. A relative path start its navigation from this location. In this case we have to copy a number of elements from Insured to Driver.
Because we change the Alt. path of the Assignment, the total Assignments context is changed. So our relative path used in value should start from the new context (CustomerDocument/Contract/Policy/MotorVehicle/Driver) instead of the old context (CustomerDocument/Contract). Using the Value editor will make this job easier.