Open up gconf-editor, either from the menu, or by typing gconf-editor in terminal.
Click desktop, then applications, then browser. Click on the text where it says epiphany-browser, and put "flock" or another browser of your choice in there. (Assuming flock is the command to start the browser, I use iceweasel, and it is just "iceweasel.")
EDIT: You may try to right-click on an html file, and select properties -- open with flock. I had to do that, to see my own html-pages in iceweasel.
Hopefully, this will help someone googling for an answer to this, just like I did a few mins ago.
Last edited by MilesMayhem; 03-03-2009 at 12:08 PM.