If someone would like to write one I'll include it with the install.
I try to make this as simple as possible for users. I understand not everyone is an expert. My advice is that you're on the right track and beginning to understand gnucleus. Try looking through all the preferences. You'll find options to set a shared files directory and everything. Actually by default your download folder is your shared folder also, so that problem is already solved. You can add more shared folders through the preferences.
Thats about it, it sounds like you have a pretty good grasp on how the program works already. And as I continue programming I'll try to make the blow easier for first time users. Try
www.gnucleus.net for the FAQ, or add some FAQ questions of your own, just email me.