To configure a home page billboard, you set up assets/blocks/content/billboards/billboard-home. But you don't drop that block into the page; this is what you do:

Edit the home page, Configurations tab, and se the "12 - Features" block to your billboard-home block. Then choose a Format: UVicCa:_internal/formats/datadefinition/blocks/uvic2012/billboard-rotator-sites-32. Note the "-32" at the end -- this is required to match the configuration of the page itself (at the top), I had a situation where I chose the plain "billboard-rotator-sites" format, and the billboard was broken (it disappeared after showing the first picture). This is because the page configuration for the WS site home page is "UVicCa2012-3-2". Watch out for this. I was working from the analogy of the Hispanital site, but their page configuration is older.