how to flash a different ROM?

is there anything i should do before flashing a new ROM. right now im running bamf sense 3.0, i want to try bamf forever. do i have to reflash my radio again? plz and thanks. If there is a thread on this i woul really appreciate a link.
 
no you dont have to reflash your radio...just make sure you backup then wipe cache and davik and then install zip from sd card in recovery.
 
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