ActiveScaffold show relational value

I have a simple table being shown in ActiveScaffold. The table has three fields: an ID, a description, and a second ID which is a foreign key to another table. In the ActiveScaffold list view, I want to show the 'name' field from the related table rather than the table value (an unhelpful ID number).

I have looked over the ActiveScaffold basic documentation, FAQ, and forum (as well as doing an SO search) with no luck. The AS API docs describe a boatload of functionality associated with ActiveRecord associations, but appear to have nothing on the basics of setting up these relationships.

How can I accomplish this?