For long, thin flow-charts, just use a custom paper size which is the same width as A4, but as long as you want it to be.
To add shadow to an object:
Right click on the object and select Area, Shadow or Select the object and choose Format, Area, Shadow.
Word wrap text in shape
Re: oooDraw: word wrap text & resize shape to fit text
If the option to Word wrap text in shape is not available…
You have probably not created a shape but a plain rectangle or polygon. I do not think these options are available for them. Try creating your polygons from the “basic shapes” or the “flowchart” buttons in the drawing toolbar and you will be allowed to do word wrap etc….