I'm trying to create some custom parts for my company in the Civil 3D 2011 Part Builder, but I have not been able to come across any good tutorials or help. Does anyone know where I might be able to find some help?

My other question (which is some what related to the first), does anyone know where I can find some more Metric Catalogs for Civil 3D 2011, specifically related to Water line structures (such as Valves, Tees, Cross, ect)? I saw one video that had a bunch of these and I was wondering if he built them himself or if they came from somewhere else?