Nested DataRepeater

[livezone]

Hi,

I am developing an online Employee Survey Program. In this program Certain Questions are asked & each question & has subquestion & each subqestion will have answers from 1 to 6 (Radio Button)

Question 1 Possible Answers(Select One)
SubQuestion 1 1 2 3 4 5 6
SubQuestion 2 1 2 3 4 5 6
SubQuestion 3 1 2 3 4 5 6
SubQuestion 4 1 2 3 4 5 6
Question 2
SubQuestion 1 1 2 3 4 5 6
SubQuestion 2 1 2 3 4 5 6
SubQuestion 3 1 2 3 4 5 6
SubQuestion 4 1 2 3 4 5 6
SubQuestion 5 1 2 3 4 5 6
Question 3
SubQuestion 1 1 2 3 4 5 6
SubQuestion 2 1 2 3 4 5 6
SubQuestion 3 1 2 3 4 5 6

How to implement the nested repeater. Also how to refer the element of 2nd or 3rd table.
Table1 Questions <%# Container.DataItem(&quot;Field&quot %>
Table2 Sub Questions ???
Table3 Answers (1-6) ???

How to link the Sub repeater to its header?

Thanks
Shafiq