http://www.redstonerelief.com/plugin-setup Is the GroupManagement thing aloud? Just wondering. By the way: If you are looking for any Permissions help, ill do it for free - not£9.35 !
I would say not, unless it's specifically denied by any of the licenses, which is /highly/ unlikely. It's generally better to do your configuration yourself though, then you can actually learn to maintain a server properly without need to rely wholly on others.