In your word document at the place you need to switch do 'insert, section
break, new page' hit return a couple of times and then do it again.
with the cursor between the two 'breaks' do 'file, page setup' and change
the orientation to Landscape - make sure you apply it to 'this section only'
you now have a landscape page within your otherwise portrait document and
can fill ti with whatever you want, spreadsheets, party invites, etc.
hth
regmigrant