Comment on FinderPop

Something similar to look into, is OnMyCommand, http://osx.iusethis.com/app/onmycommand (also free).

It's a contextual-menu editor on steroids. And you can edit/script your own little doohickeys (via AppleScript or Unix commands) to your own liking. Recommended lookup.

OnMyCommand also has an everr-growing user contributed list of commands, that you can install.