Share Valuation

Can Anybody provide me the detailed procedure for valuation of shares for a unlisted company acc to FEMA rules i.e. DFCF method of valuation. What are the number of years we have to project the Net cash Flows. And do we have to add the residual value of the company at the end of the projection to arrive at the valuation of shares or the valuation will be based only on the basis of projected cash flows......?