How to transfer an image from one picture to an other

Since you want to place an image on a curved object, you may want to try using a displacement map to give a more realistic result.  Take a look here.

Let us know if you should encounter a problem.

To transfer parts of an image:

1. Use one of the selection tools, e.g. selection brush or lasso tool,  to select the image
2. Go to Edit>copy to place it on the clipboard
3. Open the destination image
4. Go to Edit>paste. The imge will come in on a separate layer.
5. Activate the move tool to position the image.

To remove parts of an image:

1. Open the image
2. Sample the background color with the eye-dropper tool. This will show up as the foreground color on the color chip
3. Duplicate the Background layer and shut off the visibility of the background layer by clicking on the eye icon in the layers palette. Work on the background copy layer
4. Use the eraser tool to erase the parts of the image that you wish to remove
5. Open a blank layer between the Background and Background copy layers
6. Activate the Paintbucket tool and left click on the blank layer
7. Tidy up with the eraser tool.

Another way:

1. Activate the Magnetic lasso tool and make a selection of the entire vase. You should see "marching ants" once the selection is complete
2. Open a blank layer at the top (Layer 1)
3. Go to Edit>Stroke(outline0 selection Enter a 3 or so pixel width for the stroke
4. Go to Edit>Fill selection
5. Delete the background layer
6. Note: the checker board pattern denotes transparency. You can fill it with anything to suit.