i dont have cs6 but i did this in cs5.5.. unless something changed between the versions.
so i made some Lines…. AKA open paths… i then made a circle. just like you did
i then selected everything
in the path finder i use the outline button… i then applied a new stroke color and used the hollow arrow to delete all the extra stuff i didn’t need. i also switched over to outline mode to make sure i deleted all the extra elements. this should leave you with a set of lines outside the circle that are still open paths.
Ty