Step One: Open winrar

Step Two:go to %appdata%

Step Three: GO to .minecraft

Step Four: open minecraft.jar

Step FIve:Dele META INF files

Step 6:Drag mod from downloads

Step 7: CLick mod

step 8:click the one saying Application

Step 9:Intsall mod :D

CHeck out this vid. if ur having trouble. ---------> http://www.youtube.com/watch?v=HTuiHT-4vJs

Step 10: Backup ur minecraft I am not reponsible for minecraft crashes.

You Have Been Warned.

AND IF MC CRASHES UPDATE IT