Blend Picture

[newyork2050]

How do you blend a picture into a back ground or with another picture so it dosent look like its changing over so quick

[handrawn]

you need to have a grasp of how photoshop layers, and transparency gradients work - see marks post in this thread:
http://www.talkgraphics.com/showthread.php?t=26304
there are lots sites with tutorials on the web for photoshop
heres yet another [not all links active]:
http://www.photoshoproadmap.com/Photoshop-tutorials