Yeah the sky is definately overexposed, i'm not a photo shop ninja or I would have blued that up right quick, but i was just happy with how the bicycle and the leaves came out because that's what i was metering on, i might crop it.
i think its filter or something and replace color once that has came up you pick which color you want to replace and pick the color you want to overlay it with.. or just make an entire new ski....