Your sample file is actually a Portable Network Graphics format (.png) bitmap, not a raw (.bmp) bitmap.
In either case, you'd need to convert the bitmap format to one of the various PCL-format raster image formats in order to embed the image within a printer-ready PCL file - not a trivial process.
The Image Bitmap tool in the PCL Paraphernalia application (available via http://www.pclparaphernalia.eu ) provides a simple (but not very sophisticated) means of converting simple .bmp bitmap images to a printer-ready PCL print job.
Jim Asman (http://www.spectracolorservices.com ) sells a product (MKPCL) which performs the conversion for .bmp files (not sure about .png); he should be able to offer better advice than me.