Using DSM to Understand Code

Patrick Smacchia has a good write-up on using Dependency Structure Matrix (DSM):  Identify Code Structure Patterns at a Glance.

"Layer", "Cycle", "High Cohesion / Low-Coupling", "Hungry caller" and "Popular Callee" are some of the uses he explains.

Why not try DTangler with VisualWorks to use these techniques?