setting up portable thunderbird

I have posted on the mozillazine forums and recieved no joy so perhaps someone here can help.
Links from there to these urls also have provided no joy or assistance:-

http://kb.mozillazine.org/Using_webmail_with_your_email_client
http://kb.mozillazine.org/Getting_started_with_Thunderbird
http://kb.mozillazine.org/Keep_it_working_%28Thunderbird%29
http://kb.mozillazine.org/Running_from_a_USB_drive_%28Thunderbird%29

I have set up thuderbird portable on a U3 usb flash drive and have sucessfully set up an account based on a new mailbox with my ISP. This works sucessfully on more than one computer.

What I would like to do now is to to set up thunderbird to send and recieve from a brand new yahoo account (domain:-- yahoo.co.uk) which I have been able to access via webmail and also by using outlook express.

Can anybody here tell me the settings to put into thunderbird please?
A "walkthrough" tutorial would be very welcome as I'm not as technically adept as some.

Thank you