Hi.  I'm working on a project that has three permission levels - owner, member and reader. I'm looking for some info. regarding how I can set permissions for these three groups.

Owner (as the name suggests) can do what they want. Memebers will be IT staff and teachers trusted to know what they're doing.  Readers will be allowed to, er, read the documents but nothing else - no uploading, amending etc.

Many thanks.