How to get laptop to enter high performance when plugged in?

On my windows 7 laptop I play games etc when plugged in, and when on battery I normally only do work, web browsing and facebook. When plugged in I need it on high performance for gaming but when on battery I only need it on balanced. I would like to have a setting so that when I plug it in it will go into high performance and when I unplug it, it will go on balanced. I have managed to create a desktop shortcut for both the power plans so all I need is a program where I can set the computer to run a certain Program when plugged in and unplugged. Please help me to resolve this. I have tried task scheduler but it does not have the options for when plugged in and unplugged. I really need this as I forget to put it back into balanced when unplugged and when I go on a game I forget to put it high performance and then I have to quit the game and change it. Any help will be much appreciated. Best answer will be awarded points!!!