What you want is here-> Image Magick Since you are on Win32 you will need to find a precompiled version. When you get it setup, you want the "montage" function. It will join a bunch of graphics files.
Okay, I have ImageMagick 6.1.0-Q8 installed and I can use the command-line utilities.
So I need to install perlmagick. I downloaded the zip file (despite claiming it's included I couldn't find it) and unzipped to c:\temp\perlmagick\ and ran 'ppm install Image-Magick.ppd' and I got:
"Error: no suitable installation target found for package Image-Magick."
Help!