Mohamed Attar perf comments

• During configuring the environment I would describe (or take a screenshot) of what the folder structure should look like after you download and extract Win32PerfTesting_v4.zip. I personally prefer visuals (lol) rather than step by step explanations. For this specific case, I do this (this is my preference. I'm not trying to bash your document.)

Download and extract Performance Testing Zip in to the following directory:

c:\mozilla
c:\mozilla\testing\...