Ok,now that i found out how to put mods,i tried a couple. I was told i could rename a ymt file meant for the black arabian to appear to white arabian,simply by changing the name of the file. My question is,where are the ymt files of the game stored or how can i know the ymt name of all animals etc in the game so i can use them for modding?

You can use OpenIV to explore the files in the game.