I recently talked to the guys at http://www.bruceatkinson.com/dirttwister/ . They had made the most progress on editing track but have recently gave up. Apparently exiting editors were not suitable
--- --- --- --- --- --- --- --- ---
Replying to:
Well i seen on your website you need a track editor ive edited many tracks for other games and if i had the right tools i can make some for this game. Let me know