Hi there, I am Cris and will be glad to assist you.
Can you explain in detail what do you mean install iTunes to iPod?
iTunes is already installed on an iPod.
The link you provided is to install iTunes on your PC and be able to sync between your PC and your iPod.
Maybe if you can tell me what you are trying to accomplish I can better clarify things for you. But you don't need to install iTunes on your iPod.
Again you cannot load iTunes on your iPod because the app is already on there.
If you are trying to sync your computer with iTunes to put music on it. You must download the iTunes application and install it on your PC. Then plug in the iPod and setup sync options.
If you would like remote assistance I can offer it for you.
Did you still want to proceed?