In libgr-progs, jpeg-to-pnm.fpi pnm-to-ps.fpi is included. But, bmp-to-pnm.fpi gif-to-pnm.fpi rast-to-pnm.fpi tiff-to-pnm.fpi is not inclued. So, rhs-printfilters can't print BMP, GIF, Sun Raster and Tiff file.
fixed in libgr-2.0.3-18...