purpose of httpd.exp file / can't load modules

Hi,

I'm trying to understand what the httpd.exp file is used for. I'm
trying to add a module, mod_headers, to my Apache server (I'm running
Apache 2.2.3 on a new, clean Fedora 5 installation) and it's not
working. When I look at the apache/modules directory, all I see is one
file, httpd.exp, instead of a bunch of modules (which is what I
expected to see, based on a book I'm reading). There seems to be no
mention of this file on the apache.org Web site (as far as I can tell),
and Google searches have turned up basically nothing.

This is the line I addded to the httpd.conf file, to try to load the
headers module:

LoadModule headers_module /home/johnb/apache/modules/mod_headers.c

(Note that my Apache ServerRoot is /home/johnb/apache/, and Apache has
been working fine otherwise.)

So basically, I get an error that mod_headers.c can't be found (which I
guess makes sense, since it's clearly not in the directory I
specified). The only place I see this file is in the
httpd-2.2.3/modules/metadata directory, but when I substitute that
directory, it still doesn't work. I get an "invalid ELF header" error
message. Can anyone explain why I don't have a bunch of .so files in
the modules directory? It seems like if I did, this would work.

Oh, also, this is how I installed Apache: I downloaded ver 2.2.3 from
the apache.org Web site, typed ./configure
--prefix=/home/johnb/apache/, make, and then make install.

Thanks in advance for any help.

John