Spiggittles

I recently downloaded the Simply Horses mod with the Skydaz installer. The first time I got on my single player world, I was given enough time to see the mod worked. After seeing that, the game "Shut down the internal server" and afterwards gave me an error message: Minecraft has crashed! ---------------------- Minecraft has stopped running because it encountered a problem; Exception while adding particle A full error report has been saved to C:\Users\Leigh\AppData\Roaming\.minecraft\crash-reports\crash-2013-02-16_19.57.03-client.txt - Please include a copy of that file (Not this screen!) if you report this crash to anyone; without it, they will not be able to help fix the crash It now only loads the map for about a second before giving me the same message. Any help? I really want the mod and installing it manually was a little hard for me. if you have easier instructions for how to install Simply Horses, and how to fix my minecraft, please reply!