How can I bind a multitouch gesture to open a file with a particular application?

How can I bind a multitouch gesture to open a file with a particular
application?

I am running Mac OS X Lion. What I want is a way to open an HTML file with
a particular application based on my action.
For example, the default application is Safari, so it will always open in
Safari if double clicked. However, I want to add another gesture, (such as
tapping on middle top of the trackpad) while the file has been selected
(highlighted), such that it will open in TextWrangler.
Is it possible? I am also using BetterTouchTool.