If you want to add a favicon to your journal.

Tools to create favicons:
http://tools.dynamicdrive.com/favicon/
http://www.chami.com/html-kit/services/favicon/

---

Place this in your theme layer:

function Page::print_custom_head()

{

"""

<link rel="shortcut icon" href="http://yoursite/favicon.ico"/>

<link rel="icon" type="image/x-icon" href="http://yoursite/favicon.ico"/>

""";

}

Very simplified procedure for InsaneJournal customized area:

Go Here: http://www.insanejournal.com/customize/advanced/layers.bml
Go to the bottom to "Create layout-specific layer".
Choose type: theme, layer: bloggish (example of journal)
See empty textarea with two lines of text
layerinfo "type" = "theme";
layerinfo "name" = "putinyournameofthemehere";
Save and Compile
Go to http://www.insanejournal.com/customize/style.bml
Press "Look and Feel" tab
then Scroll down to "Themes" you'll see you new theme layer
Choose it and save changes.
Check your journal.

I think that's it. :)

PS. Remember Remember Remember: place this code outside of the but inside of "print custom head" function.