Forgive me if this was discussed already...

[TerranRich]

http://www.gamewinners.com/DOSWIN/cheats_l.html

...but take a look. Both Larry Vales games are in there. I consider GameWinners one of the best sources of gaming cheats out there, being the most extensive and most detailed I have ever seen. So seeing this was quite a shock to me. I thought they had only commercial games there.

Space Quest: The Lost Chapter is also in there, too.

[veryweirdguy]

I found some of 'em on GameFaqs (unoficially the 17th 1337est site on the internet) a while back too:

Larry Vales
Larry Vales 2
Space Quest: The Lost Chapter

Um....I'm sure there used to be more in there (such as Permanent Daylight, Pleughberg, 6 Day Assassin) but either they've gone, or my memory is going in my old age.

[Inkoddi]

Yes, I've known of gamewinners for quite some years and it rocks. It also has a HUGE forum where you can post things.