[whiskyb]

Having done this at a few locations my best advice would be 1- roto-till the entire yard and pick out the clippings after they dry 2- do your best to level it and somewhat pack it down 3-soil test 4-either sod which I prefer or hydro seed if it is available in your area 5- with the sprinkler system your sod will take off fine 6- in the following year top dress and level any spots that did not take.

By following this you will have a healthy wonderful lawn