Library Share Permissions and Ohter Questions

I am setting up Library Server and want to know little bit about it:

1.  What are the permissions required on the share of library server? which service accounts, computer accounts or cluster objects to add? and what permissions?

2.  Is there any limitation with respect to name of the share that it should not have any spaces in the name?

3.  Is there any limitation as how many folders inside a folder would be listed in the console?  I have around four folders inside the main shared folder and only two are showing in the console.  Can it only contain packages or single file and not extracted ISO images?  The folders inside the main shared folder that is showing only shows bit of the actual content of the folder.

Thanks in advance.