Okie, now that was just too much... So I'll explain it step by styep for you to easily follow:
- Log in to Yahoo Mail
- Click Options
- Select Account information from the left panel
- Go to Member Information, General Preferences, Preferred Content
- Select, for example, Yahoo UK* click Finished
- Go to Yahoo Mail
- You'll see a page that says "It's the New Yahoo! Mail Beta... and you're invited."
- Click on "Try Beta Now".
But I must confess, that it really worth it.... on the other hand, I've been using a similar interface with my FREE AOL Mail account for more than a year now.