CR2Editor is free, IIRC.  You can also do the same thing with a good text editor. 

Now, the million dollar answer, structure.  Poser was set up with several categories to separate the different components of you content cohesively.  Easier to click on your library tab and find that all your CR2 files are under figures where they should be.  But think of it this way, you have a kitchen drawer for your spoons, knives and forks.  There are smaller compartments to separate each item, one for spoons, another for knives, and still another for forks.  You keep this organized this way, you know where everything is located.  Now, take away the compartments and mix everything up in the drawer.  Next time you look for a fork, you have to dig down to the bottom of the drawer for a damn eating utensil.  And you're hungry as hell. 

See my analogy.