Once installed, here's how you use this thing.
Whenever you visit google
maps there will be a drop-down box to the immediate right of
the main form, like so.
You can adjust this box beyond the normal limit of 19 up to 30,
and zoom beyond the normal limits, like so:
- Install firefox.
- Install greasemonkey.
- Go to the link gzoom.user.js a click the Install button in the upper right. If you don't see this button you haven't installed greasemonkey correctly -- in which case return to step #2.