i used (basically taken from the docs)
use PDF::Reuse;
use Image::Info qw(image_info dim);
use strict;
my $file = 'c:/kopie.jpg';
my $info = image_info($file);
my ($width, $height) = dim($info); # Get the dimensions
prFile('c:/myFile.pdf');
my $intName = prJpeg("$file", $width, $height);
my $str = "q\n";
$str .= "$width 500 500 $height 100 100 cm\n";
$str .= "/$intName Do\n";
$str .= "Q\n";
prDoc('c:/anlage-h-rbskt.pdf');
prAdd($str);
prEnd();
but as i said, this will add the image to a new page. am i missing something?
it will also be ok if i could just add text to the background. | 