How to apply Apache directives to 'dynamic' HTML?

[Chris G]

I am using the default apache 2.2 configuration in Fedora 7 as server
on my home Linux box.  It's all working much as I want but I have one
issue that I can't find any really straightforward information about.

How does one apply apache directives to web pages that are generated
by a CGI script?  

I am running pyBlosxom (a python blog server) as a blog for personal
notes, I want to set the default character set for only the blog pages
to iso-8859-1 rather than the default utf-8.  How do I do this?

If it was just simple HTML then I'd do something like:-

<Directory /the/directory/with/html/files>
    AddDefaultCharset ISO-8859-1
</Directory>

(I think!)  However I don't see how to apply this to files which are
dynamically served by a CGI script, i.e. the URL is something like:-

    http://my.home.system/cgi-bin/pyblosxom.py/wiki/directory/file

What (if anything) do I put in the <Directory ....>?

-- 
Chris Green