[Scribus] Numbering pages

[ols6000 at sbcglobal.net]

Scribus 1.3.3.5, Windows XP

My document is in multiple parts, so I need to have the page 
numbering for parts 2, 3, ... begin with some number > 1. Ideally, 
part 2 would start with a page number 1 greater than the last page of 
part 1, but this is asking too much, so I would settle for having 
part 2 start at a fixed value which I can input. I am thinking of 
something in the master page like ##+10, to mean the sequence of the 
page in the document + 10.

Any way to accomplish page numbering that does not begin with 1?