I will make a better one with me talking but couldnt because of background noise, but it shows the concept and isnt limited to just what im doing in the video. You can do quite a bit of neat stuff with this technique and is all you need is your favorite memory scanner, Tsearch and CheatEngine are in my opinion the best. Here is where to get CE (http://cheatengine.org/) .
I dont know why youtube didnt let me upload the HD version?? maybe its still processing?
Here is the tutorial I made
http://www.youtube.com/watch?v=yVfJt4E29C0
If your curious here are some of the things i have done using this technique.
http://www.youtube.com/watch?v=eUvLIIE_cMc
http://www.youtube.com/watch?v=F1H6g5OX138
http://www.youtube.com/watch?v=b7uP05TLn6A
http://www.youtube.com/watch?v=tY37xXF4dGg