AddToAddressBookCM... is a contextual menu item for creating Address Book cards in a new group using the senders of selected Apple Mail messages.
Control click on one or more messages in a message viewer list to expose the contextual menu. Then select the menu item named "Add to Address Book" to create cards for each message selected using the sender of the message.
Cards are added to a new group named "AddToAddressBookCM [date-time]" where [date-time] is replaced by the current date and time. Of course you can change the name of the group if you like, or even delete it.
AddToAddressBookCM is part of the Limit Point Software Utilities Bundle : http://www.limit-point.com/Utilities.html. Purchase a Utilities password to activate all the utilities, including AddToAddressBookCM. Updates are always free, new products always included!