http://download.fedora.us/fedora/fedora/1/i386/RPMS.stable/headers/header.in... [Errno 4] IOError: HTTP Error 404: Not Found
??
The /etc/yum.conf is wrong. Verify the correct http://path with your favourite browser and realize that for FC1 (!) the "headers" directory is elsewhere:
Hey. It's not that the yum.conf is wrong -- there's actually a different yum.conf for FC1: http://www.fedorafaq.org/fc1/samples/yum.conf
The one up there currently is for FC2.
-Max