Can PrivateMessages be sent to more than one screenname at the same time (CC:)?  If so, how?

I'm afraid it's not possible. The feature is missing from user interface. Also this weekend had time to browse the code, and there's no indication it would be even planned. Maybe CC is disabled to avoid spam.

I myself would love a feature to send PM's to groups, like sending a new private mail to every user in the forum.

Thank you.

Will Recipient(s) be edited to read Recipient?