G'Day CK,
I am not sure that I understand the question.
You create a Template by creating a new document (with
as many pages as you like) and SaveAs with file type
Word Template (*.dot).
You modify a Template by opening (file type Template),
adding more pages as you like and Save.
The only other thing I can think of is a (say) Business Letter
Template where you want the Address (in the header) only
on the first page.
Create a new 2-page document (i.e. with a page break at the
bottom of page 1), with a Different First Page Header and
Footer (using Page Setup on the Header & Footer Toolbar)
Populate the First Page with the letter outline and your
Address/Phone/Fax/email etc etc in its Header & Footer.
Set up the Second page Header/Footer as you like (page
number or whatever) and close the Header & Footer.
Now remove (i.e. DELETE) the Page break, and SaveAs
a Template.
When you create a new Business Letter you will get a single
page document that, IF YOU NEED TO, will go to a multi-
page document with different Header/Footer on pp2 onward.