Help modifying dock / terminal??

Does anyone know how this user did this? (see link below)
I know you can change the dock to be more tiger like (black, flat perspective) in terminal, but how do you get it to tilt that way? If you just need to mod the dock image things, can someone please post a link to a tutorial or more importantly the images that can tilt the dock shelf-like but keep it black and shiny? (my dock is indeed on the bottom)

LINK

Thanks for your help!

- geek-inthe-pink