You can just type the recipients addresses into the To: field. Or, you could go to the address book and create a group, then just start typing the group name into the To: field. To do that, on the Inbox page open the address book, and on the landing page click on the icon that looks like three people huddled together. Then follow the prompts. You can add contacts to the group by either using the Move icon in the toolbar, or by dragging and dropping them from the list to the folder.