Installing Drupal

I get the "Unsupported database type" error. Im using mysql 4.1 Debian Linux,Drupal 4.6.3
here my settings.php
$db_url = 'root:CENSORED@localhost';
$db_prefix = '';

/**
* Base URL:
*
* The URL of your website's main page. It is not allowed to have
* a trailing slash; Drupal will add it for you.
*/
$base_url = 'http://pnode.de/~mc/drupal';

/**
* PHP settings:
*

Hi,

I am trying to set up my Powerbook such that I can run multiple drupal sites for development and testing. I have it working really well with symlinks and the default apache install that comes with OS X 10.4. The problem I have is with clean URLs; I can only get them working with the default drupal site.

I get the error message:
warning: mkdir(): File exists in c:\inetpub\wwwroot\drupal-4.6.3\includes\file.inc on line 86.
This is under the confgure tab when trying to submit changes to the Global theme settings. Also, when I click any of the links to the initial themes, I get a blank page. This is my first attemp at a Drupal setup.
I am running a stand alone XP Pro box with IIS, PHP 4.4.1.1 and Mysql server 5.0

I'm trying to install CiviCRM with an existing drupal installation. Upon trying to configure blocks for the civicrm module, I'm getting the following error:
Fatal error: Undefined class name 'crm_utils_array' in /home/{mysite}/public_html/drupal/modules/civicrm/CRM/Utils/Menu.php on line 669

I'm new to CMS and mySQL, having never worked with anything other than static webpages.

I've followed instructions in the documentations in the installation chapter, and have uploaded Drupal's files into my web server via a free FTP software.

Now, I'm not too sure when it comes to installation of the database - mySQL database. I'm not too sure whether one's supposed to download and install mySQL on one's local machine, or have to upload it into my server space.

I install and configure banner module but still get this error:

Illegal offset type in /DISK2/WWW/hipo.cz/www/drupal/banner_db.php on line 19.

Can anybody help me plesae