I would suggest not to save the KiX executables and the scripts in the GPO\GUID\ folder. Just save the BATch file there. I suggest you setup a folder structure under NetLogon that mirrors the OU structure and place your scripts in there.

You can then call the script from the BATch with:
\\domain.tld\NetLogon\WKix32.exe \\domain.tld\NetLogon\OU\OU\script.kx
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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.