Multiple Classnames?

[Circle]

I was wondering it it would be possible to have a object have more then 1 class name. For instance a  model classname and a func_door classname.

[Survivor]

If you are saying you want something to be two things at once. I'd say that's something for the coders. I know in mapping it is impossible.
What you are trying to do however, which I assume is having a dretch model move up and down or something. Yes that is possible. Read up on the use of models (.md3) and how to make them move.