Zooming using mouse ONLY

Hi all.
Lately I have taken to lying on my bed watching DVDs
I have a wireless mouse for zipping through the menus (I find it's quicker than the apple remote, either that or I just prefer it)
This made me wonder weather you could use the zoom in tool (Ctrl + Mouse Scroll) without using the Ctrl button.

for example:
Click the the scroll button then scroll it to zoom.

How would I go about doing this??


Thanks allot!

Zacariem

You can use something like USBOverdrive or Steermouse to assign actions to buttons.