photoshop: gradient transitions

Question

how can I make a transition like this with photoshop ?

http://dl.dropbox.com/u/72686/transition.png/

I need to merge these 2 images

Answer 1

How about using masking (layer masks) to achieve the above effect? This tutorial is not really what you want but it demonstrates how to use masks, or a this tutorial would be more appropriate.

Answer 2

Have you tried using the Blending Options?

Right click on the layer, select Blending Options, then Gradient Overlay. Try having a play about with that, might be what you're after...