I have a HTC Hero G2 and I'm thinking about changing my e-mail address, how do I change the one my phone use?

The address I'm on about is the one I entered when I first set-up my G2.I have a HTC Hero G2 and I'm thinking about changing my e-mail address, how do I change the one my phone use?I've got a g1 so they're prob the same. Just go into the email account (google right?) And go to settings and there should be the option to change it