Traditionally, .z is used for files compressed with a Unix utility. I read this before, but I found it here also:
Quote:
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.z Packed file (file name extension - using Pack/Unpackprogram)..lower case z..[Unix]
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http://www.msc-inc.net/Documents/Bab.../Babel_V-Z.htm
pack is the name of a program/command commonly found on Unix systems. I thought WinZip handled all common compression schemes, but maybe not this one. In the past I was able to find all kinds of freeware for Windows that would decompress anything. Just look for something that handles
packed files.