Drupal 6.x

It's possible to have a tree in Drupal 6?
The taxonomy section appear with less options available. Only FLAT taxonomy is in the default installation?
Thank you

Having been let down by someone claiming to want to do this project, I am posting it publically.

Assuming Drupal is the correct product to do this with, I am looking for somebody to put together a commercial property advertising site comprising a number of modules:

Here's the issue...

I started to use it about a week ago. I used Joomla a lot before.
There are few good Joomla Reservation / Booking engine; however, they lack the customization
that Drupa has and mainly the CCK feature.
I was wondering if anyone could tell me if what are the required component for this kind of reservation system.
-inventory availability (a certain number of seats for a particular trip are available only: once, twice or three times a week but not everyday)
-prices difference between : first class or coach
-price difference between: adults and children

Summary:
Image X Media is looking for a talented contract web developer with experience working as a Drupal themer/programmer. The position requires exceptional programming skills, problem solving abilities and a strong work ethic. Reporting to the Project Manager the successful candidate will be responsible for taking a web project from the development phase to the final product. In some cases this will require creating or customizing Drupal modules to integrate with other applications.

Hey there,

i've already tried a bunch of stuff to get it working, including looking into the core's garland's template.php for guidance and browsing through the Drupal 6 API-documentation.

My problem is: i would like to customize the way Drupal 6 outputs the attachments of a given node. I've changed the theme_upload_attachments function to my liking, put it in my theme's template.php - just as i was used to for Drupal 5 - but it doesn't change a thing. Am I missing something? I feel like i haven't fully grasped the potentially new concept of overriding functions in Drupal 6, despite reading the "Converting 5.x themes to 6.x" / http://drupal.org/node/132442 and "Overriding theme functions" / http://drupal.org/node/173880 pages in the handbook. So now I'm hoping one of you can help me get this working.

As reference, my template.php containing only the customized function is as follows:


<?php

function phptemplate_upload_attachments($files) {
$header = '

';
$content = '