Printing RSS on printer

Can you please provide a little bit of code. I want to send image data (a byte array) from my server to a thermal printer. My ethernet shield doesn't have an SD card slot so I need a little help with buffers or requesting smaller chunks of data for the theral.printBitmap() method.

My own topic is here if that helps anyone else with a similar project: Images over HTTP - Project Guidance - Arduino Forum

Thanks