Just recompiled zip.dll after several complains.
.NETZ is a free open source tool that compresses and packs the Microsoft .NET Framework executable (EXE, DLL) files in order to make them smaller. Smaller executables consume less disk space and load faster because of fewer disk accesses.
Unlike other portable executable (PE) packers, .NETZ uses a pure .NET solution and it is written in C#. .NETZ can be used to pack .NET executables written in almost every .NET language.
.NETZ supports both .NET EXE and non-shared DLL files, and it is intended to pack .NET desktop applications. The compressed applications can be used the in same way as the uncompressed ones, transparently to the end user.
The technique that .NETZ uses is not supported by .NET Compact Framework.
http://madebits.com/netz/download.php