Questions on Subscriptions and Jobs in SSRS

Articles:
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http://msdn2.microsoft.com/en-us/library/aa237763(SQL.80).aspx---Managing Subscriptions
http://msdn2.microsoft.com/en-us/library/aa237786(sql.80).aspx---Subscription Overview
http://msdn2.microsoft.com/en-us/library/aa237767(SQL.80).aspx---Creating, Modifying, and Deleting Subscriptions
http://msdn2.microsoft.com/en-us/library/aa237758(SQL.80).aspx---Using Role-Based Security
http://msdn2.microsoft.com/en-us/library/aa225485(SQL.80).aspx---New Role Assignment / Edit Role Assignment Page


http://msdn2.microsoft.com/en-us/library/ms190387.aspx---User-Schema Separation
http://msdn2.microsoft.com/en-us/library/ms188676.aspx---Ownership Chains