Drupal 7.x

i'm sick of re-writing this question over and over, so here's the link to the original.

http://www.computerforums.org/software/free-database-software-website-10...

Would Drupal work for my purposes? I'm learning Drupal 7 right now, and it looks great. I'm just not sure if what I want is possible with it.

Do you think wn.com is using Drupal, or am I just going crazy... again? I'm thinking it is, but that's just a hunch.

I am one last step completing a website I am working on, and need help ASAP. Give my 'client' already make an announcement on the website launch.

I adapted the Marinelli theme, it is a great theme!
I need to remove the default Drupal logo and the title text on the top, replace it with a header banner .jpg file. I played around with the layout.css file all day and still couldn't figure out how to remove the default logo and title on the top.

[rant class="minor"]
There are days when I wonder why I am bothering with D7. Things were much simpler and cleaner in D6.
[/rant]

I don't know how it happened, Everything was great; just about ready to go public. Then I decided to move my main Welcome article from main page Content to the right sidebar. I then created a simple Article, and published to main page. No go.

Are there any how to's to install a multi-site sub directory and NOT a sub-domain?
Perhaps a step by step.
I have searched but cant find anything. I've seen may posts and it works fine in 6, but no mater what I do I cant get it to work in 7.

I randomly got this error and it shows the username for my database.

PDOException: SQLSTATE[28000] [1045] Access denied for user '******'@'localhost' (using password: YES) in lock_may_be_available() (line 165 of /home/*****/public_html/******.com/includes/lock.inc).

What exactly do I do? It's completely random. I accessed the site last night. No problems. Now this. Suggestions?