That's good. The documentation is available online ;)

It's likely that Ovid is right and you cannot configure anything at all, but if you can, I think the following will be configurable as it is no danger for the server.

# .htaccess file
<Files index.html>
  SetHandler cgi-script
</File>
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Now you can simply put a Perl Script in "index.html" and it will work.

If you only want it to be index.html because it is the directory index, there's a better method:

DirectoryIndex index.cgi index.pl
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You don't need any index.html now, just create index.cgi (or index.pl if you like) and it will be directory index.