Apart from the
Sound Loom Reference in the CDP manual (HTML), you are probably already aware of the CDP workshops.
http://www.composersdesktop.com/workshops.htmlWhile not designed to introduce Sound Loom, per se, I found the first few workshops in
CDP Workshop 1 helpful in showing me how to perform the same processes in either Sound Loom or Soundshaper when I started out.
There is also
A User's Guide to the Sound Loom and CDP Sound Transformation Software (twSoundLoomGuide.pdf), which should be found in the "docs" folder of your CDP installation. While not exactly "step by step," I felt I better grasped the program's workflow after reading this document.
Please excuse me if you have already reviewed these documents!