I will try to explain how it was achieved.1. This is the sourcepic, just a boring bald guy (no offence)2. I created a radial fill on a new layer to get the glowing orange color. I also added a bit of yellow for extra highlighting with a brush.
3. I set the layermode to linear light, and set the opacity to 47% and fill to 70% to get the effect I was looking for. 4. The white crack is actually a nice sharp dark crack in a wall which I inverted to make it white. I cleaned it up and put this layer on screen-mode.
5. To get the lightrays I made a selection similar to the one below. It is important to know that the light is coming from one point inside the head, so all rays should origin at the same point. They start being visible, however, at the cracks, so this is where the selection starts.6. I used a radial fill from white to transparent (starting in the center of course). I put this layer behind the orange colored layer, where it gets its color from.
7. A radial blur gives the rays the desired look. It helps to make a (square) selection around the topic you want to blur. The center of your selection will be the center of the blur. 8. Finally I added some white details with a soft brush at the places where light appears from the cracks. This exaggerates the light-intensity.There. I hope this makes sense. I've got a Dutch copy of PS here, so its a bit of a hassle to translate all the commands to english.