How Do I Copy Ea/ Scripts In To My Chart?

Dear everyone,
Please kindly help me out from this ea/scripts saga.I want to know how to use/copy/download ea/script in to my metaltrader platform, and how to put them to use on the chart.I need to know the process that I must take to do it. Please, in explaning to me never assume that I have known it, but,you need to teach me the procedure step by step, so that I will be able to do it. I am prepare to learn, kindly help me .thanks.

I am assuming that you want to use the ea in MT4... the steps are as follows:

1. download the ea you want to use
2. copy the file to the experts directory in your mt4 program directory:
this will probably be:
C:\program files\metatrader4 folder\experts

3. start mt 4 (restart it if it is running)

4. the expert will appear in the list of expert advisors. drag and drop it on the chart you want to use it in

5. set the options that appear as you want and let it run

(do not forget to click the "expert advisors" button at the top to make sure it is green - ie. the experts are running)

once this is done the advisor should run.

Note: for indicators and scripts you need to copy the file to subfolders in the experts folder called "indicators" and "scripts" respectively.

THANK YOU VERY MUCH SIR!
I appreciate your procedures/steps, which I followed joyfully to number (4) with success. The ea actually appeared in the list of expert advisor.I draged it to the chart in which I wanted to use it; I noticed one small envelope while draging it to the chart. When I draged it to the chart, I release my mouse, I did not see anything, I click top expert advisor, nothing appear.
With respect, what has happened,and where did I go wrong? the ea that I am talking about is called profitcalc produced by Trader101. in his thread titled , Simple Trading Method with trader101 page1 number 1, kindly help me from number (4) of your good and simple procedure, so that I will be able to intall it perfectly. Thank you.