Hi Renee, I don't know if elements has dodge and burn but I think they should. They are most often used while using a brush tip that you can change the opacity and hardness.
Dodge will create a lighter shadow if applied correctly and Burn will create a darker shadow, however they are really not shadows, they mimic the traditional photographic darkroom technique of holding back or giving light to produce lighter/darker areas on photos.
It takes a little while to get good with these effects and have your efforts look convincing!!
As far as the little area's on Gina's blog, those almost look like little round brush marks with the hardness turned down and opacity, and then placed under the area where the pin goes into the paper. I could totally be wrong however!!
