Dear Manish,
I am afraid I cannot help you, because I am currently faced with exactly the same question.
However, part of the solution seems clear to me. Network analyst has a tool called 'Turn Table to Turn Feature'. As of version 9, Network analyst requires turn features, before that, it used a more simple turn table. The tool supposedly converts a turn table into turn features.
A turn table has the approximate format NODE_ID, From_edge_ID, To_edge_ID, COST. It is possible to create this using a join of a couple of Multinet tables. However, so far I have been unable to understand the exact turn table format that the tool would accept. For everything I have tried it gives error code 591: 'input Turn Table parameter not a valid ArcView 3.x Network Analyst turn table'
I have been looking for a specification of a valid turn table, but to no avail. I have found other, similar questions in this forum, but never with the answer. If someone reading this is able to give a specification, or (much) better yet, to upload a valid turn table then I am able to answer the rest of the question. I cannot imagine the format of a turn table is some sort of ESRI trade secret.
Please, other reader, do you have a turn table or its specification??? You will help Manish and me out.
Thanks!
B.