Hey Edwin,
thanks for posting the color pallete. For applying them to a photo, I downloaded the pic from the challenge
here, then I did some experimenting and I found that a technique that works quite well is to create an empty layer on top of the original, set it to overlay, then use the paintbrush at about 10% opacity and just paint using the colors from the pallete. The reason I used that technique is because it keeps the "digital makeup" from getting a painted on look (because it's in overlay mode) and since it's on a new layer it's completely editable later if you decide you want to lessen an effect or take out a part that didn't work well.
- David