First of all I cut out some parts from the right side to recover the left side, as you can see in the following pictures.
step 2 of 7
step 3 of 7
step 4 of 7
The result after recovering everything:
step 5 of 7
I used the grass an an overlay for the ground. Layerstyle is set to screen.
Here I made some "finetuning" for the train.
I cut out all the thing where you can look through the windows and cleaned up the wheels (Or whatever they are called in english ;) )
step 6 of 7
And here comes the boy, the girl, the butterfly and shadows.
step 7 of 7
And for the final touch I used a sepia fotofilter with the amount of 70, copied this layer, used gaussian blur with the amount of 5 and set the layerstyle to overlay with opacity of 70%