Thank you both, I'll give this a go in the next day or two.
So my understanding was partially correct but where my big misunderstanding was that the folder with the media had to be the same on each. For example, server and clients both had to have m:\media as the main root folder, but this is not the case right (just to confirm)
Arindelle, thanks for your link, this will help me. One item though did you have to create a share for where the main library was (C:\Users\<user name>\AppData\Roaming\J River\Media Center <version>\Library )
Glynor, as always, thank you as well.