I am also the parent of a nine week old.
Sorry I cant really help you as I am learning myself, but what works for us is a Lazyboy. We sit and rock until he is deep asleep then place him in his bassinet with meditation music playing.
We just persisted and then gave in and offered him a dummy. He falls asleep with the dummy then we remove it.
We currently find he sleeps in 4 hour stretches at night but hardly during he day.
Frontpack is a marvoulous thing as it enables us to continue to go about household stuff while he sleeps.
Goodluck. I feel your pain.