Mugsey: True....especially if you have a look at the 3ds mesh. It consist of a single block like body mesh, two side-mirrors and 4 wheels. So there isn't a single door mesh to be pose-able. The file is missing the texture map too, it wants a HEARSE.JPG for texturing the whole car to make up the windows, doors and stuff. Without this map the car would look like the attached one. You could convert it into a obj file and then run it through UV-Mapper to get a new texture template for your mapping, though.

I am really new with the modelling thing but I would think it takes a lot of work to make a good looking, poseable hearse car model, so dunno about the free thing - especially with all those attachments you seem to want. There are some poser cars for free, so someone might just ask those car modellers out here.