Java Programming

I have written a small browser app that returns images in .TIFF format from a remote system and delivers them to the client. I basically retrieve the image as a byte array and then stream this byte[] back to the browser, all from a servlet. The client interprets the data coming back from the server in the response and invokes native software to open it.

My problem is, I need the ability to combine two or more of these images into one byte array so I can send it back to the client as one .TIF file. They need to be able to print all of them at once or view more than one image at a time. I have been looking around and researching this issue but I can't seem to find what I am looking for. Any help would be greatly appreciated.