Screen Options

Because I have a few plugins that are used for custom sidebars and others, that I do not want visible to our users. This is possible with the screen options, but I would like to change the default screen settings for all new blogs. I tried this with my New Blog Template but the settings do not transfer to the new blogs.
1. Is it possible to do this with the New Blog Template? How? If not
2. Do you know how I might change this somethere at the network level possibly by Roles/Capabilities?