[zell12]

You still have to realize, if their ip is static or dynamic, they MUST have an ip range, it is a rule. You can add such things like:
12.66.144.*
12.*.*.55,12.*.*.145
etc... Just try to get a pattern down. You can link the ip's together using the comma.

As for the rights issue, you should be the only with with: set rights; set folder rights; server options; edit folder configuration.
NC should only be given to scripters, and you should limit their nc rights to the weapons list and classes, limited access to the db npcs and the NPC Admin with full access to all of them.

Levels folder should be set up so the people (besides you) only have .nw/.graal rights to the levels folder to stop people from local ipbanning *.*.*.* X_x

Just a few hints, and if you need help organizing the server I'll be more than happy to help you out some more, I just don't feel that some of the people from the PWA are experanced enough, however I am sure they could manage.