It's possible you mixed up some files in the process of installing the mod... That or some files were deleted. Make sure that you followed any directions on the "read me" file closely.
Do any specific error messages appear on the crash? You can also try going into your particles folder and deleting any extra or duplicate particles. They will usually have some number on the end. Double particles are often a sneaky reason why the game starts crashing mysteriously. Goodluck and I hope this helps