Spreading Dollars Across Fiscal Period

I have select statement that returns data on a construction project.
I have a start date, end date, and forecasted cost for each task in the project. I need to create a table that spreads the dollars in a linear fashion broken down by fiscal period.

I have:

task_id, start_date, end_date, cost
1, 9/15/2008, 12/15/2008, 3000
2, 7/1/2008, 12/15/2008, 550

I need

task_id, fiscal_period, cost
1, 200803, 500
1, 200804, 1000
1, 200805, 1000
1, 200806, 500
2, 200801, 100
2, 200802, 100
2, 200803, 100
2, 200804, 100
2, 200805, 100
2, 200806, 50

I can do the math to properly calculate the dollar amount, I am having trouble creating the statement that will process through each row of my select statement and insert multiple rows into the new table.