Creating Your Own Printer?

hajo asks: "I am in need of a Large (60" plus) printer which can print onto any thickness material for a specific art/robotics project. I loved the earlier Slashdot story where the two students used two motors and an inkjet can for large mural prints; but I need a higher quality end result. I can build a plotter mechanism with two PC controlled stepper motors; But I would like to find out how to use head the parts from a cheap inkjet printer. Where can I find info on the hardware and drivers for such a project. I have a hard time believing that I'm the first who wants to use the ink jet head parts of a printer to do something with them. Any hints, tips and URLs deeply appreciated. I believe this project will make for an interesting read and as thanks for any help I will keep the Slashdot community informed of any results."