OK, I haven't prepared a SBS, but the techniques I used are easy to explain, so:
1. duplicated the layer, tweaked brightness and contrast, and left the windows only. Then radial zoom blur at the top right corner of the image, and I got the rays effect by putting the layer to Linear Dodge (Add).
2. Tweaked Brightness, contrast a bit, did a little burning and dodging at some places etc.
3. Just some final touches like sharpening and colour filter.
And done! Not very hard to do if you have the idea, but nice, you must admit. =) (5 years and 2195 days ago)