Sure you can... you use call handlers for this typically (although you can also use subscribers).
Each handler has 12 keys you can map (0-9, * and #) such that they take action when the user hits them while the greeting for that call handler is playing. There's a number of actions you can take but the most common is to pass the call to another call handler. In this way you can create "trees" of any depth you want for audio text applications and the like.
Be watching AnswerMonkey in a couple weeks (shortly after the 3.1(2) version releases to CCO) for a graphical audio text manager that will give you a snappy "tree view" for putting such applications together quickly and easily (among other things).
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.