Once installed, here's how you use this thing.
When you visit google maps,
a button appears at the top labeled Get Cab Fare.
Click this button and the you are shown an estimated cab fare.
- Install firefox.
- Install greasemonkey.
- Go to the link gtaxi.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.