1. Download
this (right click save target as) and call it uhb.js
2. click on the highligh button found on
this page and add the button to one of your toolbars
3. open opera's preferences (CTRL + F12) and click on advanced
4. click on content then click javascript options
5. create a folder in your opera profile directory called user js(if you dont know where your profile dircetory is click on help|about opera for the path)
6. in the my javascripts box at the bottom browse to the user js folder you made
7. move the uhb.js file into the user js folder