diff --git a/README b/README
--- a/README
+++ b/README
@@ -16,6 +16,10 @@ Installation Requirements:
   - Access to PHP's CLI interface
   - libcURL extension to PHP (for Calvin's crawler and soon others).
   - json_encode()/json_decode() functions (as a PEAR addon or with the recent PHP versions).
+  - PHP libraries
+    - securimage-2.0.2 (optional) for captcha support for the feedback
+      form. http://phpcapatcha.org/ , see inc/config.example for
+      details.
 
 Installation:
   - Get a copy of slate_permutate.
diff --git a/inc/config.inc.example b/inc/config.inc.example
--- a/inc/config.inc.example
+++ b/inc/config.inc.example
@@ -65,7 +65,9 @@
  * Set to TRUE to use SecureImage captcha, FALSE to not use
  * it. Requires PHP library available from http://phpcaptcha.org/
  * which may be placed in slate_permutate's lib/ directory or into the
- * system PHP include path.
+ * system PHP include path. If you are using the lib/ directory,
+ * ensure that securimage is accessible at
+ * lib/securimage/securimage.php .
  */
 /* $use_captcha = FALSE; */