Auto Population of Fields Incremented by Dates in Weekly Segments

This is in Excel 2010

I have, what I believe a fairly complex request.

I have 3 fields that will be entered manually per row

Frequency in weeks = FQ Example FQ = 4 weeks
Duration in hours = DUR Example DUR = 3 hours
Start Date in Date Format = SD Example SD = 01/15/14

I have a series of columns starting at December 30, 2013. This represents the week of December 30th 2013.

It continues on until I hit the last week in December of 2015 which is 12/28/15

There are multiple rows with the 3 entries listed above (FQ, DUR & SD).

I need a function or macro that takes the Start Date (SD) for the specific row and finds it's location in the series of columns (for the example of 01/15/14, it would land on week 01/13/14). The program would enter the Duration (DUR) in that Column's Row (if that makes sense).

The program would then add the Frequency (FQ) to the Start Date (SD) and look for the next column (or Week) that it would fit in and once again enter the Duration (DUR) in that cell.

It would do this until it hits the 12/28/15 end date.