Module development and code questions

this is the code for a small custom module that i have written.

function custom_nodeapi(&$node, $op) {
  if ($op == 'submit') {
      if($node->type == 'briefing') {
         $node->content['body']['#value'] .= '<!-- break -->';
      } 
}

im trying to get it to add a break (and therefore not show show a teaser) for the 'briefing' node type but for some reason it isnt working.

all help will be greatly appreciated

I am starting to develop my own module with some page, and now I am wondering wheter it is possible to embed other modules into my module. For example, I would like to embed the core block "Who's online?" (which module is this anyway?) into the upper right corner of my own module. Is this possible?
Thx, SloMo

OK, so I'm hoping this is the right area...it could fit so many different places...

I've been reading up on Drupal for a bit, done some simple modules just for learning - I really like it. Now, I have a website currently running on PHP-Nuke and would LOVE to get off Nuke (and all nuke derivatives) - but my problem is the site is forum centered. I can obviously use PHPBB3 to create a custom site with news and my other modules I need....but I'd prefer a prebuilt system that is modular and well supported - hence Drupal.

Hi !!
I'm new on Drupal and I can't find if there are any module just developed about this. I like to register in a database the calendar of a league, and it saves the results in each match.

P.e:

Database: Team1
Table: calendar
Fields: date, local_team, foreign_team, result_local, result_foreign, num_match, category

I'd like have a module to control the entries, views, search, etc...
And than, I'd like have a block to show the last results week of the competion.

This should be trivial, but I've been playing with this for awhile and can't quite find the correct solution. I'm trying to take the time to investigate and implement this properly instead of using brut force.

I have a custom block that contains a custom search form. The results from the search will appear in the content portion of the page. I need the previously submitted values to pre-populate the custom search form (so that the user can refine his/her search without starting with an empty input and default dropdowns.)

Here's the module

I get the following error when trying to add a node of this module:

warning: array_merge_recursive() [function.array-merge-recursive]: Argument #2 is not an array in D:\xampplite\htdocs\moduledev\modules\node\node.module on line 1990.

I think it has something to do with the blapie_node_info() function, but I can't figure out what it is _exactly_. Many thanks in advance for helping me out :-)