content permissions

I want to create a three level folder stucture and in the last folder in each tree pages will be created and users will have permission to access the folder depending upon the permisions given to them. The user who has access to the parent folder should have access to all its child folders. And I want apply workflow to the pages the reviewers and publishers will change according to the folder in which the page is created.
How can I achieve this in drupal?

In researching modules for finer permission control, I found 2 modules with almost the same name. Anyone recommend one over the other?

http://drupal.org/project/node_access

or

http://drupal.org/project/nodeaccess

I created a list of content permission modules that I have encountered with their weights on my system.

1. Can we create a comprehensive list?
2. How can they work together or should they. From your experience, what has been the worst and best combinations ?
3. what effect does module weight have on implementation of access? is it true that if access is already granted, it will not be restricted by another module that comes into play later?

Weight/ Name/ Version/ Brief description

0 Content Permissions 6.x-2.x-dev Set field-level permissions for CCK fields.
(admin determines)