Don't worry - I've been PMing Andrew and got permission to do this.
Original
Edited:
Ok so it might be a bit extreme but I just wanted to show what was possible.
Here's what I did, you'll need Photoshop CS to do this.
1. Copy your b'ground layer twice
2. On the original apply the Shadow/Highlights adjustment so that you bring up the field but don't blow out the sky.
3. On the second layer change the blend mode to Multiply. (ohh pretty), but now the field is too dark. So apply a layer mask.
4. Use a black paint brush to paint in the field area on the layer mask (Make sure you select the layer mask and not the pic!!!!)
5. Then add a Photo Filter (under layer -> new adjustment layer) and select a filter that looks nice, something in the deep red, magenta, violet range. This helps make the field blend in with the colour of the sunset.
Et Voila!
If you don't want the sky to be as extreme - just add a very light layer of black to the sky section of the layer mask.