Modelling workflow for prerequisite relations produces well-defined and well-formed workflow that contains only and-splits and and-joins. Such workflow often cannot be transformed to a structured workflow. Workaround based on elements cloning produces similar structured workflow that corresponds to original workflow, but requests design of a workflow wrapper that does necessary adjustments in the runtime. This paper presents key elements of an implementation of such workflow wrapper using Windows Workflow Foundation and describes the data structure for storing data about clones and methods to properly handle clones in the runtime. Moreover, presented solution use web services and as such extends the number of supported client platforms.