Module Browser

The Settings panel includes a browser containing the possible screen saver modules.  It looks something like this:
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This browser shows the screen saving modules that are available to BackSpace.  The first entry in this browser is "All";  If all is selected, BackSpace will pick a module at random every time it activates.

BackSpace can have any number of screen saver modules, and it will search in 

~/Library/BackSpaceViews,
its "app wrapper" folder 
/LocalLibrary/BackSpaceViews 

(in that order) for all .BackO and .BackModule files containing compiled View objects to be used as screen saver modules.  A .BackModule file is simply a folder containing a .BackO module, and possibly some related files.  A .BackO module is a normal object file, but it must obey a certain protocol;  see the included file README.rtf for more information on writing screen saver modules.  A few modules are also built into the BackSpace application.