Please read the following:

This is not a stand alone product. Both the retail and demo versions of Melway/Sydway require ArcPad, a field GIS application for the desktop and PDA, that can be downloaded here.The demo version of Melway/Sydway can be run in the evaluation mode of ArcPad (no registration number required). The retail version requires a licensed version of ArcPad Contact RIA Mobile GIS