Add X Days To Dates, For Criteria Count, But Skip Weekends

I am trying to compile a count of dates using a numerical reference which adds x consecutive dates onto the initial start date based on the number in a cell.The dates added cannot fall on a weekend.

The start date for each calculation begins in D4 with the corresponding number of days to add onto this date in K4. In the example below 8/11/2007 -- 2 means that the 8th and 9th of Nov get one added to their count. As the next row also has 9th Nov as a start date one more is added to 9th Nov. As the 10th and 11th were a weekend they are skipped and the count starts again from the next Monday. I have enclosed a simplified worksheet with some sample data.

Example:

D4 --------- K4
8/11/2007 -- 2
9/11/2007 -- 3

Expected output:

AE4---------AF4
8/11/2007 -- 1
9/11/2007 -- 2
12/11/2007 --1
13/11/2007 --1