Complete list of tools used for making ePubs

Let's start with the basics. Here is a list of tools at my disposal that I am using in my excruciatingly frustrating attempt to make a functioning ePub (that is all that I ask):

Mac OS X 10.6.4 (Snow Leopard) - my operating system, platform and computing environment

Indesign CS4 - for layout, paragraph styles etc and for exporting to ePub

Springy version 1.6.1 (admittedly not a licensed version, but the free download version - would pay if I knew it would get things to work) - for editing files "in unzipped mode" without having to do a "hard extract" (more on what exactly I am doing later)

Terminal - part of the MAC OS programs

Adobe Digital Editions - the "viewer" used to view epub files

iTunes - for copying to and loading into iPad

iPad (v.1) - my ultimate destination

So, with all of this hardware and software, you would think that I would be able to get this to work. This, supposedly, is all that I need.