Crossflashing PX-740 <=> Benq 1640?

Hi experts,

how i can crossflash a PX-740 to Benq 1640 and viceversa? What software need to do this? Thanks for your Help! :bow:

read this thread http://club.cdfreaks.com/showthread.php?t=149980

Thanks, Grazie sonoluca!!! :bow: :bow: :bow: