Yes I tried Snoopdos on the game but couldn't seem to find an issue. It was working when I first installed it. The background menu image is loaded., and appears for just a traction of a second, and then the screen goes blank. Removing my saves didn't seem to make a difference. It works fine with the EXE for the normal game, but as you say, with that version of the EXE, the menu items are in the wrong place.
Yeah, discovered the Fun Park mode by accident last week when looking at some Wiki's for the game. Apparently these Jurassic Park levels are included in the normal game, but only the expansion version enabled players to access them.