Okay, I was on the verge of trying out Slimppu's suggestion when I realised that.. XD I flattened the layers in the final sig. The old .psd isn't at all similar to the final png, sadly. I tried redoing the colouring on the PSD file to make it at least look similar, because I thought I did pretty well on it..but Colour Balance wasn't working in my favour so I scrapped the idea altogether. :\ Sorry. I really wanted to give it a try.
I tried to smooth out the hair the best I could and touch up the face. I do actually like having her in the centre of the signature. I wasn't too crazy about the background because the original picture of the ground had weird natural light/dark shadows that got conveniently covered up by placing her body over them. And, wow, Chiefy. Now that you mention the shadows, XD they're totally the wrong way. I need to not make my signatures at 2am. :\
Here's all I could fix up:

I was planning on submitting to the SOTW but I don't know now. It's not..perfect.