Safari smart zoom assign to mouse button

[hasole]

I'm using steer mouse for my logitech vx revolution mouse.

Is there a way I can assign the safari smart zoom trackpad gesture (2 finger tap) to a button on the mouse or a keyboard shortcut?

 

[ipearx]

Very late reply but:

Better Touch Tool allows configuring a normal mouse button to use Smart Zoom. I assigned it to ctrl-'left click', and it works great.