How do I make a cart on a track?

I have asked this before without result,

Lets say I have a track, and I would like it to move from point A to point B, but not in a straight line, (So SINE behavior wont work),

I want it to move up, down, sides ect.. how do I make this happen?

Take a look at my post and this recent capx updated by Gmoney. My idea is also to have some sort of cart ride/zip line/ roller coaster section in my game. This is a possible way to do this.

how-do-i-create-a-zipline-or-dk-barrel-blast-move-a-to-b_t181323

https://www.dropbox.com/s/sv1548ioge8r5 ... .capx?dl=0

You can search for path, spline path keywords on the forum. I tried to achieve such things but it was impossible without knowing math. I saw interesting replies and working examples, but they didn't fit my needs for various reasons.