i know mine is a cracked version
what version of photoshop do you have?
another way to stylize renders is to make a transparent layer, and use the colour GREY (808080) or any other shade of grey, to colour over JUST the render itself. From there, you set the layer style to OVERLAY (and they grey colouring you did will pretty much disappear). From there, you use the BURN/DODGE tool, set to like 30% STRENGTH/OPACITY, on that grey overlay layer, and use it to lighten/darken certain parts of the render. I think Burn = makes it darker, Dodge = makes it lighter. This is also a good method for making/fixing/changing the lighting of a render. (i.e. you DODGE where the light source of your sig should be hitting the render, and then you BURN the shadows that the light source would create).