9b845d02_Zip_Computing____Knowledgebase__Description
[Switch] altext "XXX" [Description] 
The altext property will associate the file extension you specify with WinZip. In other words, if you double click a file with the extension specified, it will open in WinZip.
How do I customize my WinZip MSI? - WinZip Computing :: Knowledgebase
Description