Can someone point me towards a tutorial showing the best way to do this?

I had my own way of doing this using hue/saturation And merging it with the c4d.
But I was looking at one of Ladyvamptress PSD's in the pack she posted
specifically the Bliss-psd And I was wondering how she changed the color.
Or if anyone else could help i'd appreciate it..
New to PS trying to learn.. Thanks for any help..