Silgrad Tower from the Ashes

I was wondering if it was possible to add collision detection through a script. At the moment i am making a script for levitation but there is no collision detection and i'm not sure how to add it through the script. Is there any one here who knows or can help me.

Someone already made a levatation spell

OnTrigger.

http://cs.elderscrolls.com/constwiki/ind.../OnTrigger

Yeah i know but it does not have collision detection and this one will be more like Morrowind, also all the mods i downloaded said they had a slowfall spell but it did not work, well mine has a working version.