First, you can go to the ford website and follow the link to the Ford Owner's Pages. Register yourself as an owner and you can download a lot of the owner's manuals and information there.
Then, get a Chilton's Manual for Ford Windstar/Freestar. You can go to the gearhead cafe (just google it) or to Amazon. I got mine at the local Autozone or Advanced Auto store. If they don't have it on the shelf, ask them and they can get it for you.