create task in PA self service page

I want to create PA tasks in Project self service page

Task 1.00  Analysis
                1.1  Requirement Analysis  (sub task to 1.00)
                1.2  As Is Study                   (sub task to 1.00)
        2.00  Design  (peer task as 1.00)
                2.1  To Be Design    (sub task to 2.00)
                2.2  Process flows   (sub task to 2.00)

please advise 
thanks