Question on Doors and such

Howdy, I have a simple question. I understand that to make a door for a house model I would need to make a seperate .dts model. Besides constructor I own Autodesk 3ds Max 9. What I was wondering is if someone could point me out in the right direction for started on my door. Most models I have made so far are inanimate objects. So I have no experience yet on making moving things and how to get them to work with what I already have.