I'm not sure how to run this mod. I can only import outrun levels not an JH1. There's also only a JH3
Viewing post in Outrun86 - Coast to Coast mod comments
Run LayOut.exe - Then select track to import JH1 OR JH3, when loaded select export track and run. This is also the level editor to build new routes for the game. More information here.
https://github.com/djyt/cannonball/wiki/Cannonball-Manual
Hope this helps