here is the most updated firmware I could find if anyone has anything newer please post. http://www.filedropper.com/e19 e.19 english, ver 19, other helpful links below. http://en.wikipedia.org/wiki/GBA_Movie_Player http://sozoryoku.us/gbam.htm
Can I flash this firmware into my EZ-FLASH 4 without corrupt the hardware? Is there any advantage over original firmware?
There was definitely an update e20, but if memory serves it decreased stability. There is also a version of the firmware which allows it to function like a NDS flashcart available at: http://chishm.drunkencoders.com/NDSMP/index.html