Pablo, I, for one, remember quite well the time I spent getting a handle on the permissions system for Revolution.
I’m not sure if you’ve seen this or not:
http://bobsguides.com/revolution-permissions.html
I think it answers your questions, but maybe not as clearly as I hoped. I’ll try to respond to your other post as well.
Now that you’ve discovered how to get to the ACL grids, you’re probably a lot closer than you think to getting it.
I’ve spent a lot of time thinking about how to simplify the system, but it’s complex enough that I don’t think reorganizing the Manager will help much. You still have to go through the process of creating users, roles, user groups, resource groups, and ACL entries -- there’s really no way around that in the Manager. Now that I understand the system, I find it relatively easy to set up permissions to do what I want, but it took me a while to reach that point (and there was really no documentation to help at that point).
I think the best answer is a permissions wizard that walks you through the process, creates the settings for your, and then gives you a page to print out that explains what was done. I’ve been working on such a wizard in my head, but I’ve been swamped with work on the book, so it won’t appear any time soon.