Firstly, define all the necessary information for a given module ID in _modules variable, e.g.,

...
m301:{l:"m301.html", t:"Module Definition"},
m302:{l:"m302.html", t:"Layout Definition"},
m303:{l:"m303.html", t:"Column Width Definition", c:"green"},
...

• m301 - the module ID
• l - short for link, defines the url of this module
• t - short for title, defines the title of the module when loaded
• c - short for color, defines the color theme of the module, now "red", "orange", "green", "yellow", "white" are supported with blue as default.

• via http://woork.blogspot.com/2009/07/10-interesting-lightweight-jquery.html
• via http://mshook.appspot.com/z/d4m.htm?/popular/jquery

• Here's the spreadsheet: http://spreadsheets.google.com/ccc?key=r3nTy-cjddJFXh6ZmpmxcaA&hl=en#
• Here's where I set up the page: http://www.google.com/webelements/docs/spreadsheets/
• How is this different from a Google Gadget?