Confusion on Atom projects, module locations, libraries, etc.

[haresfur]

I'm having trouble understanding how to structure my files for programming my LoPy, using atom.

First, should I make each program a separate project or can you have multiple programs within a project? If I define a directory item as a project, can I have other projects at lower subdirectories?

My second question has to do with including modules. I tried to run an example from pycom-libraries-master. I opened the file abp_node.py and pressed the run icon. This returned an error "mportError: no module named 'config' "

From a search of other posts here, it seems that config.py needs to be in a lib directory, but where does that go and how do I specify its location? I tried copying it to a lib directory under the directory with the abp_node.py example and that didn't work.

A related question is when using the REPL window, how do I import a non-standard file?

Thanks for any enlightenment you can provide.