[XeTeX] generating a booklet pdf a4 to a5 in XeLaTeX

[NMPOST7]

Dear All,

I have a script, which I downloaded from the net (I think from Stackexchange)
for generating booklets (a5 format from a4). The script works well for my LaTeX
documents. (Engine: latex)

As I am doing documentation in Malayalam using XeLaTeX I woul appreciate any
help in changing the script that generates the booklet


BR
Suren
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