I assume my install is working, but there is some basic markup I need to support for our wiki.

[[free link]] Correctly searches/creates a link to that page title.
[[free link|another link]] Doesn't parse at all, it should link to the same one as the first example, but display "another link" as anchor text.

Using the image insert button you are prompted for a url and it generates markup like
[[Image:http://file.jpg|Image Name]] but this parses to just file.jpg and doesn't make an actual <img> tag in the generated $Content.

Where should I start looking to add this functionality to this module?