While it is possible to associate .kix to a specific application like KiX32.exe or WKix32.exe, I would suggest that instead you just include the path and name to the exe on the target: of the shortcut.

i.e.
%windir%\wkix32.exe "C:\KiXScripts\My Computer Information.kix"
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Give a man a fish and he will be back for more. Slap him with a fish and he will go away forever.