Module development and code questions

Hi Folks

I have inherited a drupal system 4.5.X and am currently experiencing difficulty installing the captcha module
as it looks to be written for 4.6.

However i almost have it working but for some reason the hook captcha_menu is not being called
by the drupal core. Can anyone suggest what could be the problem here ?

Some details..
In the systems table modules/captcha.module has a status of 1 .

Any thoughts would be kindly appreciated

-Paul

How can I override some, but not all of the functions provided by user.module?

For example, I don't want the user to be able to change their name, email address or password. I'd like to override the user_authenticate function to only allow local users, but authenticate them against LDAP (without the @server in the username). I'd like to disable user registration, but allow the system to create new users that don't exist as long as they pass LDAP authentication. There's more, but you get the idea...

I have developed an extensive library of company policies, procedures and knowledge base using MediaWiki. I would like to integrate this content into our up & coming drupal installation. Ideally I would like to maintain the MediaWiki syntax (so I don't have to train the users on new syntax).

As a result I have a few questions;

just today I overhauled clipper

I have the following items defined in hook_menu():

$items[] = array('path' => 'case/calendar/week',
	 'title' => t('calendar'),
	 'callback' => 'case_calendar_week',
	 'access' => user_access('view calendar'),
	 'type' => MENU_CALLBACK);

$items[] = array('path' => 'case/calendar/week',
	 'title' => t('week'),
	 'callback' => 'case_calendar_week',
	 'access' => user_access('view calendar'),
	 'type' => MENU_LOCAL_TASK);

I need to append an integer value to the defined path. For example:

Hi All,

Just made a start on the Drupal module development
(http://drupal.org/node/17914) tutorial but have falled rather heavily
at the first hurdle. I get the error:

warning: call_user_func_array(): First argumented is expected to be a valid callback, '_onthisdate_all' was given in /home/httpd/www.excellhelpdesk.com/html/intranet/includes/menu.inc on line 354.