Module development and code questions

Hi,
I want to install chatbox module in drupal.
But it says:-
Installation
------------

1. Create the SQL tables. This depends a little on your system, but the most
common method is:
mysql -u username -ppassword drupal < chatbox.sql

How can i add sql table?? where i hav to go for this??
Plzz help me.
Thanks

I am writing a new module called mynode.module for learning the drupal system. The trouble is that I cant get the http://mysite.com/?q=mynode to get to generate what I want. I get a "Page Not Found".

My mynode_menu is as follows:

/**
 * Implementation of hook_menu().
 */
function mynode_menu($may_cache) {
  $items = array();

  if ($may_cache) {
    $items[] = array('path' => 'node/add/mynode', 'title' => t('New node type'),
      'access' => mynode_access('create', NULL));
    $items[] = array('path' => 'mynode', 'title' => t('New node type entries'),
      'callback' => 'mynode_page', 
      'access' => TRUE,                  /* Allow access for anybody */
        'type' => MENU_CALLBACK);
  }

  return $items;
}

I have coded mynode_page similar to blog_page_last() in the blog.module(basically, it generates last few posts of 'mynode' type). Still when I go to http://mysite.com/?q=mynode to get to generate what I want. I get a "Page Not Found" error.
What could be the reason that ?q=mynode is not recognized? Am I doing anything wrong in the hook_menu? How can I debug this?

Little bit background into what I did:
I started from page.module & changed it for mynode.module. In the process i created mynode_form, mynode_validate, mynode_insert, mynode_load, mynode_view as per documentation at 4.6 node_example.module

I have this code in my googlemap.module file:

function googlemap_nodeapi(&$node, $op, $teaser = NULL $page = NULL) {
  switch ($op) {
     case 'view':	
      if (!$teaser) {
       $map = googlemap_single();
       $node->body = $map . $node->body;
       }
       break;
}
}

It does what I want--it inserts the output of googlemap_single() at the end of $node->body.

How do you implement a promo code feature?

A settings page where you can input a promo code?
A user box to input a promo code - which checks against the database which approves the discount...

I am just a novice... so please be nice :)

Just testing out some code... and learning php at the same time :)

  if ($user->uid) {
    print $user->uid;
	print " : This is your user ID";
  }
  elseif ($sid = session_id()) {
    print $sid;
	print " : This is your Session ID";
  }

This code should print out your UID if logged in or your session id if you are just a visitor.... right?

Why then if I pasted this in a page with php input, I always get my session ID but not my User ID when I'm logged in?

Hi, for the last few months I have been looking for a CMS for a new website I want to make, its for a flower export company.

Now I have installed and tried about 7 differant ones so far but running into Drupal seems I have found what I need :)

Let me explain what I need this website to do for me, it has to be pretty simple, but needs away to let customers place there order for flowers online, they get invoiced so no need for a payment thingy.