'For a long time I have dreamt of a "magical script" that could download packages of some other distro, cut them right down to Puppy-size, then build a Puppy Linux live-CD -- and do all of this totally automatically.'
Woof, the Puppy builder
Follow BarryK's Woof blog: http://puppylinux.com/blog/?viewCat=Woof Barry's Blog
Version control system for managing the Woof project: Bones
Tutorial: Building a Custom Puppy with Woof
What can be achieved using Woof: Dpup, Upup, Spup, Tpup 'Fatdog', Ppup
See also Puppy Package Management