Downgrade 3.80 m33-4

hey.

im currently on 3.80 m33-4 i wanna go back to 3.71 m33-2.

I have pandoras battery and mem stick from ebay, can i use this to go back to that cfw? do i need to check whether right files are on mem stick etc.
please help, will be appreciated!!
thanks

Just use your pandoras battery and it will put you back to the firmware that your version of pandora was programmed to change it to.