In the first Section's header or footer, insert a field coded as:
{SET Scn1 {SECTIONPAGES}}
In the second Section, use a field coded as:
{={NUMPAGES}-Scn1}

Note: The field brace pairs (ie '{ }') for the above examples are created via Ctrl-F9 - you can't simply type them or copy & paste them from this message.

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