If it is some non-postscript printer, you are out of luck. PostScript is a page description language, which describes curves by curves. The raw input to the printer is most probably some raster format. In the best case you'll get a pixelated rendering of the image. Or ir might be some smoewhat higherlevelsomewhat higher level language, but Im' not aware of any reverse translator. I might be wrong, the experts should know.