I am trying to string 10 pdfs together onto one very wide page so I can
print it as a scroll.
I've tried using texexec as follows:

$texexec --combination=10*1 --pdfcombine infile.pdf

but what I get is 10 pdfs at the top of an A4 sheet.
How do I make a custom page size 1480mm x 210 mm?

I've also tried using a tex file like the following:

\definepapersize [scroll][width=1480mm, height=210mm]

\setuppapersize[A5][scroll]

\setuppaper

[topspace=0mm,

backspace=0mm,

dx=1mm,

dy=0mm,

nx=1,

ny=10,

margin=0,

width=148mm,

height=210mm]

\setuplayout

[topspace=0mm,

backspace=0mm,

margin=0mm,

width=1480mm,

height=210mm,

header=0mm,

footer=0mm]

\setuparranging[XY]


\starttext

\insertpages

[input.pdf]

\stoptext


I get the right sized pdf sheet, but all the input.pdf pages are stacked on
top of one another in a big mess all on the right hand side.


Thanks for any help,
Arild