Hi Karen,
You could type it from scratch, which includes creating each field via Ctrl-F9. Or you could copy & paste the field code from the tutorial document into, say, the accompanying mailmerge main document, then run the mailmerge. For your own mailmerge, you'll probably need to edit things like the mailmerge field names (including, perhaps, adding/deleting mergefields) and layout to suit your needs.

A for the second part of the question, getting to know how to code each example was a process that took many hours. The tutorial saves you all that effort - all you need to do is to adapt the fields to your needs.

__________________
Cheers,
Paul Edstein
[Fmr MS MVP - Word]