Since I couldn't get the help documentation to work in Gthumb, I created a small htm doc that I copied from a website and added some directions for connecting a Zaurus to a digital camera and importing your pictures.
The original help documentation is in XML format with a folder of screen caps of the GUI dialogs. I couldn't figure out how to get those to work/display.
If my attachment opens in your browser instead of downloading, just "save it as" a htm doc in your browser