I can't draw but I want to draw people faces (with Inkscape)

As probably my loyal readers are used to, I write tutorials at a very low level, suitable for beginners. In the same note, today I'll talk about how to draw people faces (or hackergotchis) with Inkscape even if you don't know how to draw.
Something like this:

The basics: import a photo in Inkscape and using the calligraphic tool draw on top of it and then fill with colors and add highlights and shadows.
Sound interesting? Read more.

At some point I had the idea to make it a screencast, but the video would be long and in need for some editing. PiTiVi is far from usable and Avidemux2 can't work with Ogg, so I'm back to HTML, which is good, a HTML page is better indexed in search engines compared with a video :p

This tutorial has also a Romanian translation.