dancemammal's mp4 editor is not for 27xx series, it is for 26xx series players. :wink:
The problem is the firmware on 26xx series players is hidden from windows.
A specially made .rkp would be able to "see" the firmware, so it would be possible to extract using a .rkp utility written to run from the game menu, this would only be good for players with the GAME option. :idea:
If I was good at assembler I would write one myself, but sorry to say I'm not that good at coding.