While searching old DOS/BBS archives for the Skid Marks preview, I found "STUNTS1.ZIP" on the Night Owl PDSI-006 collection.
It contains custom Stunts tracks, high scores and a replay, made by Steve Rolfe and Jeff Renaud, Nov. 24, 1991.
The included text file says:
QuoteHere is a selection of our favourite tracks for the best of all current driving simulators, STUNTS.
Make sure you check out the incredible high-altitude crash in the replay file for G!!!!!!!...
To use the files, simply copy them into your STUNTS game directory. To erase our high scores, simply erase the .HIG files for each track.
Hope you have as much fun driving on them as we had inventing them.
Steve Rolfe and Jeff Renaud,
Nov. 24, 1991.
I couldn't open the replay with my version of Stunts though. Maybe it was made with a different version?
Not Skid Marks, but still a pretty cool Stunts find from 1991. :)
I'm familiar with this package, it's very well-known and built into many websites. For example, you can download it here:
https://wowroms.com/en/roms/dos/stunts/149969.html
Ah, that's a shame. I really thought I'd found something new there. :)