What we did was create new modules and then just put the images in these modules. Take for example the silhouettes of the 5 people. We saved the image as PNG 24 in photoshop, sized appropriately, placed the image link inside a new module and published to user position 1.
If you need some images, sxc.hu is a great place for free stock photography and graphics. Below is a search i started for you with the keywords "vector people"http://www.sxc.hu/browse.phtml?f=search&txt=vector+people&w=1&x=0&y=0
I hope this helps.