Hi Jacquelin,
It is your Yahoo profile, and doesn't really have anything to do with YLD itself.

Here is something that I think will work. I can't tell you all the steps but I can give you a general idea.

First, go to the Yahoo group that you are trying to change (for example, if it's the YLD list, then it is http://health.groups.yahoo.com/group/yld )
Then click on Edit My Membership

Then click the link that says "Add New Profile"

You probably want to read the information on that page. I think you can set up a new Yahoo profile and use that profile for the list instead of the other one.

I suspect you probably can't use Jacquelin as your Yahoo ID, since it's probably already taken by one of the millions other Yahoo users, but usually you can use a name and add numbers, like Jacquelin2004 or something.

Also, when you are posting on the Forum or on this tech forum, you can put in anything you want for your name. The forum isn't connected to Yahoo. I just mention this because I notice you put jacquelinerwin in for your name when posting your message. If jacquelinerwin is in the name field when you are writing your post, you can just put your mouse in that field, blank it out, and type what you want.

Hope that helps.
Kitty