Write your own Greasemonkey script

I've found a site called Dive into Greasemonkey which has a full guide on how to write you own Greasemonkey script, you can write a script for you own needs and everything you need to know from how to install Greasemonkey to making complex scripts is here.

You can read it online here: http://diveintogreasemonkey.org/toc/
or download it here: http://diveintogreasemonkey.org/download/