You don't go upstairs in the Say Cheese shop. The comic piece is over to the right by the camera, atop the spotlight.
The photo is blowing in the wind near the lighthouse (far right on the island).
it is the camera shaped place with steps
Yes. It is by the restraunt
There is no net on Big Nate island. There is a lobster trap, and you can recover it for Cap'n Salty. Grab the photo blowing around by the lighthouse and take it to the Say Cheese photo shop. The owner will give you some scuba gear to dive for the trap.
You win it at the hangout place in the playground when you play with Nate.
at big Nate's island
in the cabinet on big Nate island
No. You can't. You can only exchange the old photo for the scuba gear and that's all.
Climb up on the lighthouse and jump out. (see related question)
The man at the "Say Cheese" photo shop.
The seal island is to the right of the lighthouse, and you can get there by racing Nate on the jet skis.Catch the photo blowing in the air by the lighthouse, and swap it for diving gear at the Photo Shop. Use the gear at the lighthouse to recover Cap'n Salty's lobster trap, and he will give you the keys to the jet skis. You will have to go to the top of the lighthouse and look through the telescope to see the island.
On 'Big Nate Island' go past the photo shop and the playground and if you see a rock with 'Puffin Point' then you are there