From FDT Documentation
Right now is an exciting time for Flash development. Soon there will be mobile AIR development, mobile Flex development and new Flash/Flex features continuously being added. This makes SDK management particularly important.
This tutorial will go over the basics of managing SDKs with FDT.
All you need to follow along is a project open. You can either create your own or just import the project created at the end of the Basic AS3 Tutorial.