Try to contact the members gjbarord and robyn on tonmo.com. They both have experience with Nautiluses and know how to properly "burp" the air out of them. I, while I hope to one day own a Nautilus, have just read about their care.
These threads may be helpful as well:
http://www.tonmo.com/forums/showthread.php?t=11125
http://www.tonmo.com/forums/showthread.php?t=1792
Good luck with him. We'd love to see pictures.
Acclimation should probably be closer to 1.5-2 hours, and needs to be by dripping. Don't feed fish regularly, they are ok as a treat. Gjbarord and Robyn (on tonmo) will have more information on the best captive diet for them.