title: Many bmp files to one file
body: <p>I got 7000 bmp files and each file is 1kb big with a single letter in it (ascii-code).
  I have no idea how to open them all together.
  I tried pdf printers but I can't print the bmp files because the printers say they are broken. I can open the files with "irfanview" but only 1 file after another and not together.</p>
  
  <p>Thanks in advance.</p>