How to add commands to the OS X "right-click" menu – Simple Help

"This tutorial will show you how to use OnMyCommand to create customized "right-click" (contextual) menus in OS X. If you're a recent Windows 'switcher', you might have noticed that the right-click options lack some of the commonly used tasks (move-to, copy-to etc). OnMyCommand allows you to add these, and hundreds of other commands, back to your contextual menu."

http://www.simplehelp.net/2007/06/12/how-to-add-commands-to-the-os-x-right-click-menu/