Download the two self-extracting archives by clicking and holding on the relevant link and choosing Save this Link as...
Once downloaded, unzip the archives using a program such as Stuffit Expander or ZipIt. Make sure that you unzip part 1 and part 2 to the same destination so that the file structure is like that shown below.
The main index page for accessing the revision quizzes is called index.html and will be located in the top level folder you created during the unzipping (as_a2 in the example above). You should be able to open this file by