Yes, you can. This must be done at the time the driver is compiled though, one cannot (quite) do it on the fly. Look in the dgd/src/lpc directory for more information concerning this. The 2.4.5 mudlib simulation contains a good example of how to do this.
To perform this operation almost on the fly, compile the new version of the driver with the C version of the new LPC objects included then perform a state dump of the game before shutting down and restarting with the new driver.