all I use is photoshop...don't need plug ins other than noise ninja IMO
just stack stack stack layers!
well I can't tell you step by step of replicating that because not even I can because I keep refining and refining layers until I get what I want
ok so here's a quick example, I did a quick remake of it today with less layers (its not perfect because I did it in a minute to show an example)
http://farm3.static.flickr.com/2363/...eb78ffae_o.jpg
http://farm4.static.flickr.com/3220/...a54f1c0d_o.jpg
See what I did with the Curve layer? I went RGB -> Blue and pushed the bottom corner point up
by itself it doesn't do much, but with the other curve layer with say, Red and pushed down into the green section it creates that "bluey" effect
Gradient in a radial reverse to darken the background (yeah you can burn but I prefer gradient because its smoother and faster for me) and selective colour is my opposite of curves
usually when I do a lot of curves, I get unwanted oversaturation of certain colours, usually yellow
so I go into selective colour and pick the colour I want and usually lessen its effect or make it more white
usually Black+Yellow minus (eg -70/-40) does the trick
I hope that helps
really YOU have to experiment, that is the only way you'll learn
and always try using multiple layers, if you don't like doing that then thats fine, but its definitely something to try
ok thats enough about me
DROOPY
I really like the last one, the dog looks really cute and guilty, like you caught him doing a poo or something :D