Thanks to a link posted by Deb, I found a place on Bally's website where you can download Hot Shots Progressive, S & H Greenstamps, and Playboy Slots and play for free.
Here's the link: http://www.ballytech.com/player-cent...-for-free.html
You do have to sign up, but you can decline to receive stuff from them.
Funny, I always dis S & H Greenstamps, but I can see there's a lot more potential to win now that I've played it for free! If I ever do see it again, I'm gonna play it.