All - thank you for the responses.
Nico - We work mostly in PA and NJ so I need to generate nodes that represent the standard drainage structures for those states. We tend to use the same handful of structure types so I was hoping to modify the *.x files provided with Powercivil. However, without an understanding of what the coding in the *.x files means I'd be shooting in the dark until I hit something. I'm looking over the FDOT training booklet.
Beebe - How do I modify the pipe connections so they connect to the nodes and not each other?
Matt