New Post: Left-to-Right Directed Graph Automated Layout

I've been working a bit with NodeXL and want to do the following. I want to represent a process flow as a directed graph with the origin at the left-hand side and the end point(s) at the right using an automated layout routine. I'm not finding what I want to do. The Sugiyama algorithm is closest but it "flows" from top to bottom of the graphic. Any suggestions on creating a left-to-right directed graph?

Thanks!
Jon