I'm just trying to replace the Internet in the tray with chrome and put my email down there but it just will not let me
Go to the app drawer >:
Long-press the Sense 5 Internet icon in the launch bar, drag it up and place it somewhere else or remove it completely > Long-press the Chrome icon and drag it down to the empty spot in the launch bar.
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If you want to remove something else from the launch bar and replace it with your email icon repeat the same process. If you don't want to remove anything else from the launch bar but want to add your email icon then you can just create a folder in the launch bar by long-pressing, dragging and hovering your email app over another icon in the launch bar. This will create a folder with your email and whatever other apps you choose to add to it.