Many thanks Chronos, unsure if it's a freebie or whether there's cash involved. Completely in the dark about the procedure or if there's potential for catastrophe if I persist. After download...what then??
Scroll down for the list of progs/apps you want to open a port for. When you click one, you will get free step by step instructions.
I remember finding it a bit confusing too.
By the way, when you connect to router admin pages (type 192.168.1.1 in your browser bar), have a hunt around for an option to backup/save your router settings. If you ever mess anything up you will be able to restore it.