These settings control the "HotDog experience". I wish I could say that using a background image on your HotDog Desktop would make your life complete. I guess it could give you a momentary flicker of happiness - you can't ask for much more than that from an HTML editor.
To edit your General Environment Settings:
On the Edit menu, select Preferences submenu.
Select General on the tree view of the Preferences dialog and then select Environment Settings.
Check this option to make HotDog play its various sound effects.
Check this option to use an animated waiting cursor. (It looks cool).
Click on the color board to select the color that will form the background color of the HotDog desktop.
Check this option and select a picture to use as the HotDog desktop background.