problem with a file in a jar

I have a problem with a file in the my game jar. The name of the file is tilegame.dat. In this file I have all images (pngs), levels (my own format...), music (midi, wavs). I have stored all of them in this unique file without any compression... there is only a header to identify the contents of the dat and the content of the files. I have used only bytes to store the data. Ok, the problem is that when I put this file in the JAR it get compressed (by the jar) and the read method of the file does not work any more, if I turn off the compression it works fine... Ok, the problem is that I want the compression... how should I proceed?

[652 byte] By [luisoft] at [2007-9-30 6:06:49]