Irrlicht Engine

Just out of curiosity wouldn't you want want your game in general to react in the following way? Simply because it will optimize it it in general. I'm only asking because all of the opengl and direct3d books i've read on engine programming always point the same thing out...

..........Shutdown ...

Has anyone ever made a class or did reworked the quake3 reader to also read in additional parameters. For instance, lets say you add a model into a quake 3 map, and set certain paramaters with it using qeradiant. Then with a class reading the parameters in the map and running them via the engine ...