When I did them, I just wintersowed like everything else.
Instructions on seed packs assume that you will be growing them under lights. For wintersowing you don't need to do all that stuff. Don't read instructions, just sow the seeds.
My only suggestion would be to maybe wait a while on those. Big seeds like that can rot if left too long in cold wet soil. I'd probably wait until around late February or early March.
Karen
