Right-click the contact and drag it to the Inbox; select "Copy here as
Message with Text" from the popup menu, and a new message window will
open with the text from the contact in the message body.  You should get
all the fields that are shown in that particular view of the Contacts
folder, plus maybe a few standard fields; if you need more, you'll need
to switch views or create a custom view that shows the fields you need
to appear in the e-mail.