The DaphneLoader source is in with the rest of the source, which is available on the download page. It's coded in Visual Basic 6. (There is also a nascent linux port in C++.)
At the moment, it seems to be named ".tar.tar", when it should be ".tar.gz". If you're using Windows, you can use WinZip to extract the source files from this archive.
There is also completely separate cross-platform UI project named "Dirk."
http://www.jaegertech.com/dirk/
As for artwork, I don't think there is anything at higher resolution than what is available on the site and in the program. (Matt, is there a source file for the logo artwork, or is it purely a bitmap?)
What did you have in mind for using these? I always like to hear about projects that people have going on...
-Warren.