you use one of the wooden coaster types under coaster>settings, then when you've made your track go supports>auto supports. If you want you can tweek each track segment to be a bit different (no walkways on one side or something like that) I hope that this helps you out.
Thank you guys, but when i downloaded it it said that i need to download the full version of it... which i already did.. I paid and all..Help me out here guys