Sorry, my primary expertise is not in setting up LAMPP or XAMPP or coaching people on creating or setting up or using webservers.
The link I sent is simply to a version of XAMPP that is compatible with Zen Cart v1.3.8a, since you were concerned about having obtained an incompatible version.
You might find help on setting up your own webserver over at www.webhostingtalk.com or another site whose sole focus is on setting up and running webservers specifically.
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