>Hi Viv, it's the setting up in IIS I'm unsure about ( never used it ) I've only used IIS Express with VS to develop this and have no idea how to host everything on IIS proper ( I assume I'll have to host the client and service on there ? ), thanks for your time.

It should just be a question of adding the code for your service to IIS or, better, if you've got it as a separate dll then just add the project to the web site.
Adjust the web.config to expose the endpoints (as shown in the link)

The client can be anything but will need to communicate over HTTP.