I just posted a blog entry about how I use the GIMP for full page PCB layouts as feurig/don was hating on the GIMP a while ago, I had to let him know what's up. FLOSS! Feel free to make edits to improve it or ask questions about sections that are unclear. http://dorkbotpdx.org/blog/ax/pcb_panellizing_in_the_gimp -Alex