Hi Angel-
The odds are that you don't... and quite probably can't very easily.
That large file, however, is probably the result of a Mail Merge. If so, the
address info was read from a source of data, and the same source file can be
used to generate mailing labels. It may be just a matter of doing another
mail merge, but to labels rather than a letter.
Check into it from that direction first.
HTH |:>)