Module development and code questions

Hi all

I've been using drupal for more than a year, but recently I came across category module and am very confused with it. I tried going through the tutorial on the author's site, but after that I still couldn't make a proper category. I just want something simple:

container > category > content

but my content just doesn't appear in the category for some reason.

How to make two different pages for URLs 'site.com/mypage' and 'site.com/mypage/'?
I used page_example.module as example to write my module prints page with URL 'site.com/mypage'.
I registered function only for 'site.com/mypage':

I am building a module for drupal 4.7.

I want to create 2 buttons on a form.
1 to submit, 2 to go back.

$form['button1']['submit'] = array('#type' => 'button', '#value' => t('Save') );

$form['button2']['submit'] = array('#type' => 'button', '#value' => t('Back') );
$form['button2']['#action'] = url('user/register'); //change this to the link location

But the Back action overwrites the save action.

Hi, i have a script in one of my blocks that i assign a country pulled from a geoip site to $visitor_country_name. The block does what its suppose to do and displays the right thing for that country.

However.. when i try and use $visitor_country_name in another one of my blocks it isnt assigned to anything. Is there a way to make variables global in drupal? so i can call $visitor_country_name anywhere anytime?

Or is it limited to just one block?

I haven't ever used the forum module. Is there a way to access node comments from the forum module and treat the threads just like any other topic?

Hello:

I have a problem with forward.module, i think it is a error code, and this is the information i have obtained:

http://drupal.org/node/99684

Something with the same problem? whit a solution?

Thanks