>I found one dll, unzip.dll that is available in UT file section. It provide some function to unzip programmatically files. I use it to distribute automatically my exe updates. I wrote a small fll to "wrap" the ugly dll functions that would have required structures. If you are interested in I may send it to you. (for free of course)
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how ugly is 'ugly'? Maybe we can offer a wrapper using CLSHeap or STRUCT to handle the structure issues, and limit the distribution to just the one DLL? It's especially attractive now that ME has incorporated support for Zip files right into the Explorer, and the odds are there's a Shell call to do the unzip stuff right from the WinAPI...