Neal, did you try reseating the memory on your old machine?? Maybe even replace it?? That might speed things up a bit. Also you might want to try to up the RAM a bit anyway. Can never have too much!
I have an old Compaq 1780. P100. Came with 95 but I loaded 98 on it. Being in the computer field I happen to have access to a lot of spare parts and in my travels I've picked up a lot of simms and I maxed it out. It was my Dad's and I keep for sentimental reasons. I actually got it back from someone I had sold it to like 10 years ago! My mom thinks I'm crazy. Anyway, it was the only computer that would play this old flight sim called Dawn Patrol that I spent hours on back in the day. Seems that the onboard video was one of the few compatible with the game. It is a labor of love though.
I got it up and working about a year ago was able to load the game but there was no sound. I haven't started it up since. Saving it for a rainy day, or maybe retirement!!