You are installing the wrong file - use the other cd with the Masterskill folder and then:
To install the HTML Lessons:
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(1) Double click on Install-HTML-Lessons.exe
(2) Press Unzip button.
(3) Press OK
(4) Press Close
(5) A folder named HTML has been created on you C: drive with all the HTML lesson files.
To install the Cascading Style Sheet Lessons:
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(1) Double click on Install-CSS-Lessons.exe
(2) Press Unzip button.
(3) Press OK
(4) Press Close
(5) A folder named CSS has been created on you C: drive with all the CSS lesson files.
To install the JavaScript Lessons:
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(1) Double click on Install-JSCode-Lessons.exe
(2) Press Unzip button.
(3) Press OK
(4) Press Close
(5) A folder named JSCode has been created on you C: drive with all the JavaScript lesson files
Note: There are no files to install for the first Masterskill section (Introduction to the Internet). Only Masterskill sections 2, 3 and 4 has datafiles that should be installed.