This help information is available in the help menu and by tapping on the circle-i icons in the Preferences and Plugin Managers.
You can customize PalmIshido by using plugins.  You simply hotsync your plugins and select the ones you want to use for each screen configuration in the Options | Preferences menu.
There are three kinds of plugins: Board, Pieces and Sound.  You can mix-and-match these.
If your device has a supported virtual Graffiti or virtual input area (Hi-Res+), PalmIshido will work in up to three configurations: Square (the standard for Palm devices with square screens), Wide (landscape) and Tall.  You can set a different plugin combination for each of these.  
To change between the configurations use your device's rotate and input maximize/minimize buttons (usually on the statusbar).
