Umm...

http://www.jempeg.org

The first link is to Sun's page for Java with instructions. The second link is to:

http://www.jempeg.org/current/jemplode.jar

Not sure what you are doing wrong or what you are unzipping. There's nothing to unzip.
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Christian
#40104192 120Gb (no longer in my E36 M3, won't fit the E46 M3)