Trying to change account type in MAIL to allow POP3 to connect to my Yahoo?

Can anyone help me with this mail feature...

I am trying to add my yahoo mail account to the MAIL option/ feature on my MAC, and it is not letting me without signing up to Yahoo Plus account.

However, I have found this site:
http://help.yahoo.com/l/us/yahoo/smallbusiness/bizmail/pop/pop-03.html
and
http://www.emailaddressmanager.com/tips/mail-settings.html

Which states you can enter it through POP3 account type.

I have tried this By going to MAIl> PREFERENCES> ADD ACCOUNT.

then when I add in account type from the drop down menu it only has POP available and NOT POP3 option like it states in that web site to use.

And when I try to add the account I get this message:
Logging in to mail server “plus.pop.mail.yahoo.com” failed. This server may require an additional fee for Yahoo! POP access. For more information, visit Yahoo! Mail Plus. If you continue, you might not be able to receive messages.

So I have tried to continue and just add the outgoing and ingoing info that the site stated and I still can't get it to work. I think the main problem is getting the POP changed to POP3?

How do I do this. So I can use my yahoo account on the MAIL feature.

Is there a new updated MAIL feature? I have the MAIl Version 4.1 (1076)?

Does this only let you use Yahoo Plus mail? I don't want to upgrade since it charges you a fee to have this e-mail account.

Any information?

Kelli