Forecast Data Transfer to Demand Management

Hi

We are in 6.0 (R/3) and need help with the following problem. We get forecast data in a XL sheet which undergoes revision before it is finalised. Now, the problem is how can we transfer this finalised XL file into demand mangement (MD61) screen? Any help is much appreciated.

We tried to create a infostructure at MC21 similar to S076, but the key figures does not have the qty - we added to it. Are we in the right direction? How do we add the period(month or week or daily) fields? How do we transfer data from this infostructure to S076? Because S076 will not have the new key fields we added? Please help...

thanks

BE