CAN BE DONE WITH PSP OR PS
Okay; so get your base and everything all cropped and such. This includes any sharpening/contrast anything you wish to do to prepare the image.
Next create a new raster layer.
Use your GRADIENT and pick two colors. I think light colors look best; I chose #c2febb & #b8eaf6 for my gradient.
Fill your layer with the gradient & then duplicate the layer so you have two layers with the same gradient.
Change layer 2 to color burn [or burn with psp] && Layer 1 to darken and you get something scary like:
& since that is way scary; I took the bottom layer [the base] and duplicated it; dragged it on top and set the layer to overlay.
remember to test other things out as well; this is just a basis to it!!! Every picture is different!!