Hi there,
I'm from Ireland and the UK, and have been working with Microsoft Windows for 25 years now.
I've worked for well-known names in the UK,Europe, America and Japan, on very large-scale multi-user enterprise Windows desktop/server client-server environments, using Visual C++(which is the language used to develop most of WIndows and it's underlying components).
I can easily assist you to architect and design this system; but would like to have a skype or phone call perhaps, first? Voice would be easier, as you are in Ireland too. :)
I can also offer formal technical design and architecture diagrams for the final system, that developers can use; as a seperate project done later on? I offer UML, flow charts, MS Word and other diagramming and modelling services, as part of technical architecture and design.
Cheers
Dinesh