Module development and code questions

Hi,

does anybody know how the http://drupal.org/handbooks page is created? Is there some kind of module that emulates this, or maybe a short PHP code?

I'm trying to put a table in my module and everywhere i place it i've got this error:

Fatal error: Cannot unset string offsets in ..\www\drupal\includes\form.inc on line 318

table works on my drupal site cause I'm using other modules that got it too.. I even tried to cut and paste some code to check if i made some errors..

even if i use a simple code like this:

function print_table(){

$header = array('this', 'is', 'my', 'test');
$rows[] = array('wow', 'it', 'works', 'great!');

Hi,

My module is producing this error repeated four times when you visit it's block's configuration page:

warning: Cannot use a scalar value as an array in /home/mysite/public_html/includes/form.inc on line 1583.

Any idea what could be generating that? I'm not exactly sure where to look. Here's my block code:

/**
 * Implementation of hook_block().
 */
function forward_block($op = 'list', $delta = 0, $edit = array()) {
  switch ($op) {
    case 'list':
      $blocks[0]['info'] = t('Most Emailed');
      return $blocks;
    case 'configure':
      $block_options = array(
        'today' => t('Most Emailed Today'),
        'week' => t('Most Emailed This Week'),
        'allTime' => t('Most Emailed of All Time'),
        'recent' => t('Most Recently Emailed')
      );
      $form['forward_block_type'] = array(
        '#type' => 'radios',
        '#title' => t('Block Type'),
        '#default_value' => variable_get('forward_block_type', " "),
        '#options' => $block_options,
        '#description' => t('Choose the block type'),
        '#required' => null,
        '#attributes' => true,
      );
      return $form;
    case 'save':
      variable_set('forward_block_type', $edit['forward_block_type']);
      break;
    case 'view':
      ...
  }
}

I am trying to create users from within a custom module. I want to leverage hook_user and hook_form_alter in the right way to enter users into the database and then capture additional data in custom tables I have created. I have read the documentation but have not come across any good code examples of how to do this. Can someone post a simple example of how you would add a user from within a custom module using hook_user? Sorry if this is a stupid question but my we decided to go with Drupal and then the lead programmer quit in a huff and I'm stuck trying to make the deadline.

Anyone could tell me how i would execute a function i have called custom_front() ..
by going to example.com/custom_front/

and also where would i put the function ? into the template.php?