In this video we open the .eps file with all the characters into Photoshop and paint the shadows and highlights. The beauty of an .eps file, with antialiased off, is that you can open it at any size or resolution (unlike .png which is broken in Flash CS3) and select the various colors perfectly for masks while you paint.
This isn't really a "how to use Flash" tutorial. Rather it is a tutorial that shows how you can convert your comic lineart to vector art and bring it into Flash using the freely available Inkscape. It also shows how to color in the line art in Flash, work with gradients, and using a modular approach to characters. Basically, it's just some ways Flash could be used for comics.