Drupal 4.7.x

We are thinking about setting up a Drupal Website. Our needs are, however, very specific. We will have multiple users (separate from the site administrator) who will need multiple levels of access. These users will not be technologically savvy - most will use their access to update personal profiles, some will be able to update news items or events. We envision having an easy backend interface for these users (an editing tool). Are these available in Drupal? What do backend screens look like? How easy will it be to install multiple levels of access?

I have an upgrade question which I think Is related to theming engine and removal of xtemplate in 4.7.
Currently using bluemarine theme with Xtemplate in vs 4.6.0
When upgrading to vs 4.7.; even by passing by vs 4.6.5; after running update.php we get this message:
user warning: Duplicate column name 'severity' query: ALTER TABLE watchdog ADD severity tinyint(3) unsigned NOT NULL default '0' in /var/www/websites/knosos/drupalcopy/includes/database.mysql.inc on line 124.

I recently installed FlexiNode for 4.7 but I am not able to enter my Admin>Modules area now. I am just shown a blank page. Everything was working fine before this, so I would assume this issue is related to Flexinode.

I followed the instructions, put the .mysql table in my DB. I uploaded the appropriate files into Module/Flexinode.

Does anyone have any experience with this?

Thanks,
-=Vince

Im trying to change the text that says "Read More" within the teaser area of my nodes to display "Read Full Article". What file do I need to look into to find this text?

Thanks,
-=Vince

taxonomy/vocabulary/term is public, all user share the same category tree.
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But i need a module ,site user can set his/her own taxonomy/category, i.e. user A have a taxonomy,like a tree, user B have another taxonomy,like another tree.
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It is usefull to BSP builded by Drupal, any blogger have the own category tree, as well as share the system tree.
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Is there a module can fit this?
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(i am a new English User,sorry )

I am about to create my first Drupal site. I am very familiar with vB. I currently use a different CMS front-end for most of my vB sites.

My question is can I have both the vB files and the Drupal files in the root of my web directory?

Thanks in advance,