# the following will redirect www.mysite.com/foo/bar to show the 
# output of the script previously accessed at 
# www.mysite.com/foo/cgi-bin/bar.cgi, assuming that direct access to 
# www.mysite.com/foo/cgi-bin/bar.cgi functions as desired
<Directory "/var/www/foo/">
    RewriteEngine On    # enables Rewrite
    RewriteBase /foo/    # tells Rewrite to apply the following to 
                         # requests beginning with www.mysite.com/foo/
    RewriteCond %{REQUEST_URI} !-d    # rule applies if request does 
                                      # not exist as a directory
    RewriteCond %{REQUEST_URI} !-f    # rule applies if request does 
                                      # not exist as a file
    RewriteRule ^(\w+)$ /foo/cgi-bin/$1.cgi [L]    # perl-compatible 
                                               # regex applies to 
                                               # request string 
                                               # following RewriteBase
</Directory>