How do I setup up WebDav? What are the firewall requirements (i.e. portsthat need to be open)? Where do you configure security (IIS? NTFS?).I don't want to use FTP to share file because of ...

basically, you should be able to read the docs that came with it to set up mod_dav. It's fairly straightforward to set up, took me like 5 mins when I did it. www.webdav.org has some docs online as ...