All of the walls in my house are plaster. Would it be possible to just install drywall over the plaster?

All of the walls in my house are plaster and we would like to replace them with drywall. Instead of knocking out all of the plaster, would it be at all possible to just screw drywall into the studs over the plaster? The plaster walls are all in pretty good contidion - the ceilings in most of the rooms are some kind of fiber tile, except in the bathroom and closets which are plaster (these are badly cracked). Any help and/or suggestions would be appreciated!