(re: Pepper’s Adventures in Time) I believe Mark Seibert was the producer for this game. Anyway, in addition to a walkthrough, Mark’s got the full game available for download from his website! Pretty cool of him, “since Sierra no longer sells this game,” as he says.
Link: http://www.markseibert.com/the_full_game.htm(http://www.markseibert.com/the_full_game.htm)
I downloaded it and tried playing it myself some time ago, and I got to the end of the first chapter which was *very* enjoyable (love the animations!), unfortunately, after that I got a lot of crashes and errors, which made me miss cutscenes and generally discouraged me from playing further.