I've checked this CD, and indeed it has the games the original poster had been looking for (called Ascension and Arkane). That CD has preview screenshots in BMP format for each game, and Ascension looks pretty good for an obscure shareware game.The games you're referring to (and others) can be found on:
[url=http://%20cd.textfiles.com/100gg/Arcade%20Games%20For%20Windows%20%281998%29/]100 Great Games/Arcade Games for Windows[/url]
It was a very hard find.
While I have little free time for this now myself, this CD's contents might very well be worth a look, and maybe some should even be added to the site eventually.