Maybe the problem is with Super Skidmarks itself? I rember the first Skidmarks had some problems like that, crashing all the time, and it happened even with the ORIGINAL version.
I never played Super Skidmarks, unfortunately
. Skidmarks is a great game, it would be better if it didn't crash that much.
I didn't know Jurassic Park had an ECS version.. was it ever cracked? I never saw it around here.(I always wanted to have this game, but never could, as there was only an AGA version here in Brazil)