To quote RJ Jacquez, a senior product evangelist at Adobe:
One of the most powerful new features
in RoboHelp 8, which rarely gets
mentioned, is the new Scripting
engine, which Incidentally is the same
scripting language also used in
Photoshop, Illustrator, Bridge,
Soundbooth and other CS4 products.
Put simply, the RoboHelp Scripting
Language is a Javascript-based
scripting language that exposes APIs
to invoke most of the basic
functionality of RoboHelp in an effort
to automate complex or repetitive
tasks.
For developing new scripts, all of our
Adobe applications with scripting
support use Adobe ExtendScript Toolkit
CS4, which naturally ships with Adobe
RoboHelp 8.
For more information about
ExtendScript Toolkit CS4, please click
HERE.
It appears SoundBooth does indeed use ExtendScript. The link in the quote points to the Adobe scripting center, where you can download the ExtendScript Toolkit and some PDFs to get you started on scripting.