from memory, it goes something like this:

let the program do an auto configuration for internet enabled programs, and allow it to do it's job. you probably will have a situation occur where you are getting warnings about intrusions, but if you will look closesly you will see they are accessing port 6346. When this happens, check the box to always allow this. If you don't, you won't share, and you will also be interupted a hell of a lot by the warnings. As I say, this is from memory, and I am also using internet security, which I am assuming has the same firewall program. Good luck, and share some files.