If you are STRUGGLING ONLY, here are some instuctions: Click on the cross or check, click on the laptop to turn it on, then you'll have to click on the google chrome sprite, then type gmail, click show, report or download, wait a bit and then.....
Here are the links to the pictures we used: http://www.technologytell.com/gadgets/48873/gmail-may-have-left-beta-but-you-can-send-it-back-with-google-labs/ http://www.androidcentral.com/chromeos