Changes

I am recommending rather then doing a step by step guide perhaps some visuals. lol. I'm not trying to bash your document, I just need to write something and this is the first thing I thought of.

An example of what I would do for [http://zenit/wiki/index.php/Firefox_Performance_Testing_:_A_Python_framework_for_Windows_Documentation#Configure_the_environment configuring the environment] :