Sometimes I would like to read a comic from images in a directory. So I implemented that.
Some details about this:
Unfortunately I don't know a way to register a program for opening a directory in Mac OS X. But you can now select a directory when opening a comic and the images in there will be treated as if they came from an archive.
I was a little bit lazy though... Since I don't use the features for converting archives I didn't bother giving directory support for this functionality.