Version: 2000

I've inherited a lengthy index and need to add to it. It
seems the person before manually typed in page numbers
for names of people. I am using Word's indexing feature,
but when I select and mark a name (John Smith, for
example), the entry shows up in the index under "J." How
can I tell Word 2000 that when I select a name, I want
that name to show up as "Smith, John" under the "S"
section? Is there a field code I need to change, or is it
VBA, or...?

Thanks for any advice/help on this!
kpchop