L.B.
We sing our daughter to sleep.
It sounds like he's pretty desperate, doesn't know how to fall asleep, and needs help learning a new way. They say that dads are better when the baby is used to the breast. Maybe Dad can start out by doing the bed-time routine (and naps this weekend), and this can help transition your baby to you.
Start out before he is tired - winding down, closing the shades, making it darker in the house. No big antics. Maybe wear some lavender or have some in the air. Rock and cuddle him, try to stay positive and supportive no matter what. White noise is good. Maybe get an air fiter/purifier like a HEPA one (feed two birds with one hand).
I like neurofeedback. You can get a $10 mp3 from brainsync.com or hemi-sync.com (I'm not sure there's a dash in it). YOu can get a sleep one.
Good luck,
L.