I can not manage httpd.conf to be able to enable directory index in a single specific folder:

<Directory />
Options FollowSymLinks
AllowOverride All
Order deny,allow
Deny from all
IndexIgnore *

<Directory "/srv/http/testsite/images">
Options FollowSymLinks +Indexes
AllowOverride All
Order allow,deny
Allow from all
</Directory>

Wrong?

Things I think you would like is:

<Directory />
  Options FollowSymLinks -Indexes
  AllowOverride All
  Order deny,allow
  Deny from all
</Directory>

<Directory "/srv/http/testsite/images">
  Options FollowSymLinks +Indexes
  AllowOverride All
  Order allow,deny
  Allow from all
</Directory>

This may also 't be working based on ~what~ you anticipate to become a catalog file... you need to have the ability to add something this for your .htaccess too

DirectoryIndex index.html index.html.var index.shtml index.php index.htm index.cfm index.cfml

In my opinion index.htm isn't a default, might be what's missing.

-sean