The Firefox extension is very useful for making websites behave as you would like them to behave. I've written two scripts for GreaseMonkey so far.
Version history: 2006-01-22: revert links when QuickGallery is 'closed' and test images 2006-01-13: assigned 'z' to zoom (bugfix), improved image finding, added close button 2005-12-02: updated the script to work with GreasMonkey 0.5.3 2005-06-08: fixed RegExp problem and improved Opera key bindings 2005-06-04: updated the script so that it works with Opera 8 2005-06-03: added support for normal links to images 2005-06-02: 90% rewrite. Added images as overlay, tooltip, and zooming. 2005-06-01: Initial write.
Here's a nice review of QuickGallery