Squidipa - my nefew had a crooked penis that had to be resolved with surgery like this when he was 12 mths. My sister used dispossable nappies so I cann't help you with that. But like the others said, keep it slathered in vaseline and just ensure you change his nappies regularly. One of the problems my sis had to deal with, was that my nefew kept on trying to play with it, which of course hurt. It mostly healed up within a couple of days (as in pain) so keep panadol on hand for that, although the actual healing process took about six weeks (from memory). When he first came home he had a little bandage on his penis, and that came off a couple of days later when he was allowed to have a bath.

If you want some more info, feel free to pm me - if I don't know the answer I can certainly ask my sister for you.