At that time we would like both http: and https: to be directed to the same directory (/big/dom/xmydom/www).
Can this be done? Is there a fee for the change?
SSL can be mapped to the /www directory however note that the address that can be used to access SSL must match the Certificate.
So if your certificate is issued for secure.mydom.com then you would still have to use https://secure.mydom.com/
to access the Secure site without errors being thrown..
There is no charge for this change, in fact SSL Activation Letters carry this:
" ** Note: on request the Document Root can be changed to
Can it be scheduled to happen at (or at least near) a given point in time?
If you send a request we can usually have the mapping change done within 24 hours after receiving the request.