Installing Drupal

Can anyone direct me to a function and feature comaprison between the most popular content management systems? Particularly stability and maturity? Perhaps a comparison between available blocks and nodes too? Where could I learn more about their architectures and relative merits?.. without having to download, install and test each one...

I have a integrated chat room that I get for free from my hosting provider. To enter it, you put in your "nickname" in a box and hit enter. I understand that when logged in the site dynamically puts your "login" name on the upper most block to the right. Is there a tag for this that I can just put into the code for the block? My purpose is that the user will just hit "enter" and go into the chatroom using the name they are logged into the site with and submit content with...

I tried installing the pager Refer module...
Install and 'activated' successfully.
When I try the 'Refer this page' link, my browser generates this URL :
http://www.trematon.com/drupal/submit.php?mod=refer

Which results in a 404 Not Found Error :

/drupal/submit.php was not found on this server.

Would it be a wise move to try and extract this file from the Drupal 3.0.0 bundle for use with my Drupal 4.0.0 ??

Or should I abandon this module?

members.lycos.co.uk/psysys/site is where i uploaded Drupal..

i followed exactly the instructions...
$db_url= "mysql://psysys:ienteredmypasshere@localhost/ienteredmydatabasenamehere";

Lycos seems that does not let you to create another database but only tables under one database..

when i pointed /includes/conf.php like this members.lycos.co.uk/psysys/site/includes/conf.php i got a blank page..

sometimes i get this error:
Fatal error: Table 'psysys_uk_db.variable' doesn't exist query: SELECT * FROM variable in database.mysql.inc on line 56

I've followed the install instructions successfully and I can view the initial http://....../drupal/index.php

However, I cannot access the admin.php to setup an initial first user.

When I try to view http://...../drupal/admin.php I get :

"You are not authorized to access to this page."

The permissions on admin.php are 644 and owned by the same user as the Apache (nobody).

Can anyone shed any light on this or suggest how I proceed?

TIA

C.W.

The title says it all. I installed and configured two different drupal sites and I have been trying to get the distributed authorization working. Is there something I am missing? I have the drupal.module enabled on both servers, and everytime I try to use the username@server with the correct password, I get a "Sorry. Unrecognized username or password" error each time.

Again, I checked and double checked logins and passwords, and they are all correct. What am I missing?

Thanks in advance.