How to create a new YMessenger ID
How to create an new Yahoo! account from Messenger:
On Messenger window, under the sign in boxes, you’ll see the “Get a New Yahoo! ID“. Select it. Follow the prompts on opened “Yahoo! Registration” page to create your new Yahoo! account.
Also, you can create a new account from the Yahoo! Registration page.
Go to the Yahoo! Registration page.
Follow the prompts to create your new Yahoo! account.