Enlighten me, what is the advantage of having a 2nd gmail account on the same Google account?
Since I don't know, I'd just create a 2nd Google account.
If the situation is that you want to send and receive emails for two different gmail email addresses from the same webmail page, I could understand that, but instead, I handle several different email accounts from google and elsewhere by using Thunderbird Portable email client instead of webmail, so it just checks them all and I can choose which to use to send email as well.