I have some experience with the Skyrim Creation Kit, and have made some small mods. I am really interested in creating new races, and have already made a mod that allows the player to create an old person, a child or a dremora. To accomplish this, I simply found their IDs in the editor and checked the "playable" box (and unchecked "child"). When I attempt this with some of the non-human races, such as wolf, horse or dragon, the game crashes as soon as I select that race in the character creation screen.
My question is this: Why does the game crash instantly, and is there a way to make animal/monster races playable fairly easily (I don't have much knowledge with scripting or creating meshes). Thanks.