Embodiments of the invention provide methods for evaluating the accuracy of a molecular model properties model. The acquisition unit acquires an image of one page from images of a plurality of pages included in one file. A packing passage is provided and adapted to communicate a first side of the packer assembly to the annulus between the conduit and the borehole on a second side of the packer assembly. An advantage of the method and arrangement of the invention is that the pro-active actions, including pre-allocation of some critical resources for seamless handover of an ongoing IP session, facilitate timely implementation of the activities required for handing over an IP session, andor selection of a target access router. Other tools are provided as well.