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From WPKG | Open Source Software Deployment and Distribution
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Latest stable release - 13.11.2005
Latest testing release - 03.12.2005
Other WPKG downloads
WPKG-HTTP - WPKG web interface - alpha, doesn't have full functionality.
All downloads - All WPKG downloads, on one page.
3rd party downloads
Optional, depending on server/client setup:
srvany.exe and instsrv.exe files - needed to run WPKG as a service (advanced; you don't really need it for WPKG)
scripten.exe - Windows Script 5.6 - needed for Windows 2000 olny (which is shipped with WHS 5.1)