Road/street/track Help?

So I am having a hard time figuring out how to make a road/street/track. I have made a couple in .dts format and they work great however when I try to make the track spiral upwords my collision detection goes away. I have been told that I should build my tracks in .dif format however I am using 3ds max and I heard that is not the best tool to use for .difs. Can I export from 3ds max to another program and kick out a .dif. I have a specific track design I would like to stick to however I think starting off with a simple track would be best.

Is there any way to import a whole track and no just pieces?

Thanks for the info.

I feel like I should give up this fight and just learn QuArk.

-Georgep4