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Oh! thank you!

Hello,

I am having some fun with package gb4e, it manages to crash packages "graphics.sty" and "color.sty" (called from package "hyperref" with option "colorlinks=true").

The error is
Missing number, treated as zero.

And offending line is

l.29 \catcode`\^^A
=\catcode`\%
in packages ...

Thanks for advice, alas pdfpages package did destroy the links and booklets wasn't exactly what was needed. However, booklets were close enough to investigate bit further and I found this:
http://www.svenhartenstein.de/latex-booklets.php

Although it is ugly solution and doesn't do what I need ...

Hello,
is there a LaTeX package that can merge pair of pages into one? For example, I have [a5paper,portrait]document with 10 pages, I apply thesf wrdq ewhis package and get [a4paper,landscape]document with 5 pages.

This could be accomplished by using documentclass option "twocolumn", unfortunately ...