> I might have known at one time, considering I'm the one who originally changed
> it, but that was over a year ago, and I've completely forgotten.  I'd have to
> go through all the icons in redhat-artwork and/org redhat-logo's to find it.
> (OK, I just did a quick look and didn't see it in the main places I changed.)
>
> So, my suggestion, look through the icons from redhat-artwork and/or redhat-logo's.

After some intensive searching I found the file I was looking for:
/usr/share/icons/Bluecurve/24x24/mimetypes/start-here.png

Regards,
Patrick