[Mailman-Users] How do I Modify welcome message ?

[phf1 at free.fr]

I would like to simplify the welcome message generated by Mailman.
What do I have to do?

A second question: the archives when they are private, they are visible, but 
when they are public, I get the followiong error:
"
Forbidden
You don't have permission to access /pipermail/fede-scop/ on this server."

What do I have to do to make the archives public ?


Thank you


Philippe