Err...that´s a joke, right? :wallbash:
You give us the link to the site that lets you download these games. There´s this nice button "main page". If you click it, you´ll get to the main page, where you will find out, that these games were designed for the "classic and wonderful BBC Microcomputer".
If you now look at the line of text between the paragraphs "Contents" and "Some of the many games in the Archive:", you´ll find this:
Want to get the games to play on your PC? Click
HERE for a quick, three-step guide.
That will lead you to a step-by-step-guide about how to play these games.
(I even save you time by including the correct link into the above quote... I seem to have my "be friendly"-day <_< )