[scribus] 'Tête-Bèche', 'Upside-down' or 'reversible' book pages

[Eric Hanuise]

Hi all.

I'd like to prepare a document that has a set of 'normal' pages and then 
a set that is in reverse from the rest.

Actually two documents, which will be made in a single booklet, with 
each document upside down from the other :
Say document A and document B. The resulting pdf would have the 
following pages :

A1 A2 A3 A4 A5 B5 B4 B3 B2 B1 with all the B pages rotated 180°
So you can open it to doc A on one side, and to doc B on the other.

How do I set up Scribus to handle that kind of booklet ?
I'm looking to a few extras too, such as independent (ancd correct) page 
numbering for A and B (so 1 2 3 4 5 5 4 3 2 1).

Is there some script, extension, or setting that allows for that ?
Should I rather issue two 'normal' PDF's and give the printer specific 
instructions for imposition ?

Thanks in advance :)

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Eric Hanuise - Flatlined Games
http://www.flatlinedgames.com